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10647073081 = 61987171763
BaseRepresentation
bin10011110101001110…
…10111000100111001
31000111000100100112001
421322213113010321
5133301122314311
64520255421001
7524562425251
oct117247270471
930430310461
1010647073081
114573aa4657
122091824761
131008a88158
14730080961
15424ac84c1
hex27a9d7139

10647073081 has 4 divisors (see below), whose sum is σ = 10647306832. Its totient is φ = 10646839332.

The previous prime is 10647073057. The next prime is 10647073091. The reversal of 10647073081 is 18037074601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-10647073081 is a prime.

It is a super-2 number, since 2×106470730812 (a number of 21 digits) contains 22 as substring.

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 10647073081.

It is not an unprimeable number, because it can be changed into a prime (10647073091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23895 + ... + 147868.

It is an arithmetic number, because the mean of its divisors is an integer number (2661826708).

Almost surely, 210647073081 is an apocalyptic number.

It is an amenable number.

10647073081 is a deficient number, since it is larger than the sum of its proper divisors (233751).

10647073081 is an equidigital number, since it uses as much as digits as its factorization.

10647073081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233750.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 10647073081 in words is "ten billion, six hundred forty-seven million, seventy-three thousand, eighty-one".

Divisors: 1 61987 171763 10647073081