31564466644 has 12 divisors (see below), whose sum is σ = 58487100084. Its totient is φ = 14853866624.

The previous prime is 31564466639. The next prime is 31564466651. The reversal of 31564466644 is 44666446513.

It can be written as a sum of positive squares in 2 ways, for example, as 22461016900 + 9103449744 = 149870^2 + 95412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232091599 + ... + 232091734.

It is an arithmetic number, because the mean of its divisors is an integer number (4873925007).

Almost surely, 2^31564466644 is an apocalyptic number.

31564466644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31564466644 is a deficient number, since it is larger than the sum of its proper divisors (26922633440).

31564466644 is a wasteful number, since it uses less digits than its factorization.

31564466644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464183354 (or 464183352 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

The spelling of 31564466644 in words is "thirty-one billion, five hundred sixty-four million, four hundred sixty-six thousand, six hundred forty-four".