31407970644 has 48 divisors (see below), whose sum is σ = 82433379840. Its totient is φ = 10469320632.

The previous prime is 31407970609. The next prime is 31407970651. The reversal of 31407970644 is 44607970413.

It is a self number, because there is not a number n which added to its sum of digits gives 31407970644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1786404 + ... + 1803899.

It is an arithmetic number, because the mean of its divisors is an integer number (1717362080).

Almost surely, 2^31407970644 is an apocalyptic number.

It is an amenable number.

31407970644 is an abundant number, since it is smaller than the sum of its proper divisors (51025409196).

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

31407970644 is an equidigital number, since it uses as much as digits as its factorization.

31407970644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590328 (or 3590308 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 31407970644 in words is "thirty-one billion, four hundred seven million, nine hundred seventy thousand, six hundred forty-four".