31577661140 has 24 divisors (see below), whose sum is σ = 66392161920. Its totient is φ = 12616002848.

The previous prime is 31577661139. The next prime is 31577661151. The reversal of 31577661140 is 4116677513.

It is a congruent number.

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, 924152 + ... + 957711.

It is an arithmetic number, because the mean of its divisors is an integer number (2766340080).

Almost surely, 2^31577661140 is an apocalyptic number.

It is an amenable number.

31577661140 is an abundant number, since it is smaller than the sum of its proper divisors (34814500780).

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

31577661140 is a wasteful number, since it uses less digits than its factorization.

31577661140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882711 (or 1882709 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 31577661140 in words is "thirty-one billion, five hundred seventy-seven million, six hundred sixty-one thousand, one hundred forty".