31604144564644 has 24 divisors (see below), whose sum is σ = 60579952566840. Its totient is φ = 14359692458496.

The previous prime is 31604144564639. The next prime is 31604144564653. The reversal of 31604144564644 is 44646544140613.

It can be written as a sum of positive squares in 4 ways, for example, as 2761745422500 + 28842399142144 = 1661850^2 + 5370512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31604144564591 and 31604144564600.

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, 8013219267 + ... + 8013223210.

It is an arithmetic number, because the mean of its divisors is an integer number (2524164690285).

Almost surely, 2^{31604144564644} is an apocalyptic number.

31604144564644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31604144564644 is a deficient number, since it is larger than the sum of its proper divisors (28975808002196).

31604144564644 is a wasteful number, since it uses less digits than its factorization.

31604144564644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16026442527 (or 16026442525 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 52.

The spelling of 31604144564644 in words is "thirty-one trillion, six hundred four billion, one hundred forty-four million, five hundred sixty-four thousand, six hundred forty-four".