231638103756 has 30 divisors (see below), whose sum is σ = 605547759740. Its totient is φ = 77212701144.

The previous prime is 231638103733. The next prime is 231638103799. The reversal of 231638103756 is 657301836132.

231638103756 is a `hidden beast` number, since 2 + 3 + 1 + 638 + 1 + 0 + 3 + 7 + 5 + 6 = 666.

It is a super-2 number, since 2×231638103756² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 357465886 + ... + 357466533.

Almost surely, 2^231638103756 is an apocalyptic number.

It is an amenable number.

231638103756 is an abundant number, since it is smaller than the sum of its proper divisors (373909655984).

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

231638103756 is a wasteful number, since it uses less digits than its factorization.

231638103756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714932435 (or 714932424 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

Adding to 231638103756 its reverse (657301836132), we get a palindrome (888939939888).

The spelling of 231638103756 in words is "two hundred thirty-one billion, six hundred thirty-eight million, one hundred three thousand, seven hundred fifty-six".