102131644356 has 72 divisors (see below), whose sum is σ = 302243270784. Its totient is φ = 28468748160.

The previous prime is 102131644313. The next prime is 102131644387. The reversal of 102131644356 is 653446131201.

102131644356 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 3 + 1 + 644 + 3 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 102131644356.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4932160 + ... + 4952823.

Almost surely, 2^102131644356 is an apocalyptic number.

It is an amenable number.

102131644356 is an abundant number, since it is smaller than the sum of its proper divisors (200111626428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102131644356 is a wasteful number, since it uses less digits than its factorization.

102131644356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9885041 (or 9885036 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 102131644356 its reverse (653446131201), we get a palindrome (755577775557).

The spelling of 102131644356 in words is "one hundred two billion, one hundred thirty-one million, six hundred forty-four thousand, three hundred fifty-six".