31631632136 has 64 divisors (see below), whose sum is σ = 68796974400. Its totient is φ = 13509151488.

The previous prime is 31631632129. The next prime is 31631632147. The reversal of 31631632136 is 63123613613.

It is a junction number, because it is equal to n+sod(n) for n = 31631632096 and 31631632105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101171 + ... + 271106.

It is an arithmetic number, because the mean of its divisors is an integer number (1074952725).

Almost surely, 2^31631632136 is an apocalyptic number.

It is an amenable number.

31631632136 is an abundant number, since it is smaller than the sum of its proper divisors (37165342264).

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

31631632136 is a wasteful number, since it uses less digits than its factorization.

31631632136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372358 (or 372354 counting only the distinct ones).

The product of its digits is 34992, while the sum is 35.

The spelling of 31631632136 in words is "thirty-one billion, six hundred thirty-one million, six hundred thirty-two thousand, one hundred thirty-six".