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12642801031 = 73209956267
BaseRepresentation
bin10111100011001000…
…11101010110000111
31012122002122211121001
423301210131112013
5201343024113111
65450311034131
7625205015140
oct136144352607
935562584531
1012642801031
1153a85935a3
12254a06b947
131266397b73
1487d146ac7
154dede51c1
hex2f191d587

12642801031 has 8 divisors (see below), whose sum is σ = 14449622400. Its totient is φ = 10836156408.

The previous prime is 12642801019. The next prime is 12642801097. The reversal of 12642801031 is 13010824621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12642801031 - 27 = 12642800903 is a prime.

It is a super-2 number, since 2×126428010312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642801131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196560 + ... + 252826.

It is an arithmetic number, because the mean of its divisors is an integer number (1806202800).

Almost surely, 212642801031 is an apocalyptic number.

12642801031 is a deficient number, since it is larger than the sum of its proper divisors (1806821369).

12642801031 is an equidigital number, since it uses as much as digits as its factorization.

12642801031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88373.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 12642801031 in words is "twelve billion, six hundred forty-two million, eight hundred one thousand, thirty-one".

Divisors: 1 7 32099 56267 224693 393869 1806114433 12642801031