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7115167081 = 1129372112857
BaseRepresentation
bin1101010000001100…
…01101010101101001
3200100212102221022201
412220012031111221
5104032440321311
63134010420201
7341214631231
oct65006152551
920325387281
107115167081
113021365380
121466a31661
1389512a149
144b6d78cc1
152b99b79c1
hex1a818d569

7115167081 has 32 divisors (see below), whose sum is σ = 8288657280. Its totient is φ = 6045580800.

The previous prime is 7115167067. The next prime is 7115167109. The reversal of 7115167081 is 1807615117.

It is a 3-Lehmer number, since φ(7115167081) divides (7115167081-1)3.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 7115167081 - 231 = 4967683433 is a prime.

It is a super-2 number, since 2×71151670812 (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a deceptive number, since it divides R7115167080.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7115167081.

It is not an unprimeable number, because it can be changed into a prime (7115167681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2489005 + ... + 2491861.

It is an arithmetic number, because the mean of its divisors is an integer number (259020540).

It is a Poulet number, since it divides 27115167080-1.

Almost surely, 27115167081 is an apocalyptic number.

It is an amenable number.

7115167081 is a deficient number, since it is larger than the sum of its proper divisors (1173490199).

7115167081 is a wasteful number, since it uses less digits than its factorization.

7115167081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145.

The product of its (nonzero) digits is 11760, while the sum is 37.

The square root of 7115167081 is about 84351.4497859995. The cubic root of 7115167081 is about 1923.3649651398.

The spelling of 7115167081 in words is "seven billion, one hundred fifteen million, one hundred sixty-seven thousand, eighty-one".

Divisors: 1 11 29 37 211 319 407 1073 2321 2857 6119 7807 11803 31427 67309 82853 85877 105709 226403 602827 911383 1162799 2490433 3065561 6631097 17481983 22304599 33721171 192301813 245350589 646833371 7115167081