31373236136 has 16 divisors (see below), whose sum is σ = 64172528640. Its totient is φ = 14260561840.

The previous prime is 31373236133. The next prime is 31373236163. The reversal of 31373236136 is 63163237313.

It is a self number, because there is not a number n which added to its sum of digits gives 31373236136.

It is not an unprimeable number, because it can be changed into a prime (31373236133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178256936 + ... + 178257111.

It is an arithmetic number, because the mean of its divisors is an integer number (4010783040).

Almost surely, 2^31373236136 is an apocalyptic number.

It is an amenable number.

31373236136 is an abundant number, since it is smaller than the sum of its proper divisors (32799292504).

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

31373236136 is a wasteful number, since it uses less digits than its factorization.

31373236136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356514064 (or 356514060 counting only the distinct ones).

The product of its digits is 122472, while the sum is 38.

The spelling of 31373236136 in words is "thirty-one billion, three hundred seventy-three million, two hundred thirty-six thousand, one hundred thirty-six".