31711393608 has 64 divisors (see below), whose sum is σ = 79591680000. Its totient is φ = 10528776192.

The previous prime is 31711393607. The next prime is 31711393639. The reversal of 31711393608 is 80639311713.

It is a super-2 number, since 2×31711393608² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31711393608.

It is not an unprimeable number, because it can be changed into a prime (31711393607) by changing a digit.

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, 11800441 + ... + 11803127.

It is an arithmetic number, because the mean of its divisors is an integer number (1243620000).

Almost surely, 2^31711393608 is an apocalyptic number.

It is an amenable number.

31711393608 is an abundant number, since it is smaller than the sum of its proper divisors (47880286392).

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

31711393608 is a wasteful number, since it uses less digits than its factorization.

31711393608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 31711393608 in words is "thirty-one billion, seven hundred eleven million, three hundred ninety-three thousand, six hundred eight".