31644026136 has 64 divisors (see below), whose sum is σ = 87919027200. Its totient is φ = 10545734304.

The previous prime is 31644026131. The next prime is 31644026153. The reversal of 31644026136 is 63162044613.

31644026136 is a `hidden beast` number, since 3 + 1 + 644 + 0 + 2 + 6 + 1 + 3 + 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 31644026136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31644026131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206781 + ... + 1232723.

It is an arithmetic number, because the mean of its divisors is an integer number (1373734800).

Almost surely, 2^31644026136 is an apocalyptic number.

31644026136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31644026136 is an abundant number, since it is smaller than the sum of its proper divisors (56275001064).

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

31644026136 is a wasteful number, since it uses less digits than its factorization.

31644026136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31605 (or 31595 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 31644026136 in words is "thirty-one billion, six hundred forty-four million, twenty-six thousand, one hundred thirty-six".