31440550656 has 72 divisors (see below), whose sum is σ = 88081846720. Its totient is φ = 9928590336.

The previous prime is 31440550633. The next prime is 31440550679. The reversal of 31440550656 is 65605504413.

It is an interprime number because it is at equal distance from previous prime (31440550633) and next prime (31440550679).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062730 + ... + 1091913.

Almost surely, 2^31440550656 is an apocalyptic number.

It is an amenable number.

31440550656 is an abundant number, since it is smaller than the sum of its proper divisors (56641296064).

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

31440550656 is a wasteful number, since it uses less digits than its factorization.

31440550656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154681 (or 2154667 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 31440550656 in words is "thirty-one billion, four hundred forty million, five hundred fifty thousand, six hundred fifty-six".