31572874640 has 160 divisors (see below), whose sum is σ = 82088246016. Its totient is φ = 11231559680.

The previous prime is 31572874609. The next prime is 31572874651. The reversal of 31572874640 is 4647827513.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2590160 + ... + 2602320.

Almost surely, 2^31572874640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31572874640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41044123008).

31572874640 is an abundant number, since it is smaller than the sum of its proper divisors (50515371376).

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

31572874640 is a wasteful number, since it uses less digits than its factorization.

31572874640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12297 (or 12291 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 31572874640 in words is "thirty-one billion, five hundred seventy-two million, eight hundred seventy-four thousand, six hundred forty".