102156064510631 has 4 divisors (see below), whose sum is σ = 102156085024272. Its totient is φ = 102156043996992.

The previous prime is 102156064510583. The next prime is 102156064510691. The reversal of 102156064510631 is 136015460651201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102156064510631 is a prime.

It is a super-2 number, since 2×102156064510631² (a number of 29 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 (102156064510691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510366 + ... + 14512548.

It is an arithmetic number, because the mean of its divisors is an integer number (25539021256068).

Almost surely, 2^{102156064510631} is an apocalyptic number.

102156064510631 is a deficient number, since it is larger than the sum of its proper divisors (20513641).

102156064510631 is an equidigital number, since it uses as much as digits as its factorization.

102156064510631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20513640.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 102156064510631 in words is "one hundred two trillion, one hundred fifty-six billion, sixty-four million, five hundred ten thousand, six hundred thirty-one".