31357840964 has 12 divisors (see below), whose sum is σ = 55063514604. Its totient is φ = 15625408224.

The previous prime is 31357840963. The next prime is 31357841003. The reversal of 31357840964 is 46904875313.

It can be written as a sum of positive squares in 2 ways, for example, as 16414734400 + 14943106564 = 128120^2 + 122242^2 .

It is not an unprimeable number, because it can be changed into a prime (31357840963) 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, 13376747 + ... + 13379090.

It is an arithmetic number, because the mean of its divisors is an integer number (4588626217).

Almost surely, 2^31357840964 is an apocalyptic number.

It is an amenable number.

31357840964 is a deficient number, since it is larger than the sum of its proper divisors (23705673640).

31357840964 is a wasteful number, since it uses less digits than its factorization.

31357840964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26756134 (or 26756132 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 31357840964 in words is "thirty-one billion, three hundred fifty-seven million, eight hundred forty thousand, nine hundred sixty-four".