31604621604560 has 20 divisors (see below), whose sum is σ = 73480745230788. Its totient is φ = 12641848641792.

The previous prime is 31604621604559. The next prime is 31604621604629. The reversal of 31604621604560 is 6540612640613.

It can be written as a sum of positive squares in 2 ways, for example, as 14079815326864 + 17524806277696 = 3752308^2 + 4186264^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 197528884949 + ... + 197528885108.

Almost surely, 2^{31604621604560} is an apocalyptic number.

It is an amenable number.

31604621604560 is an abundant number, since it is smaller than the sum of its proper divisors (41876123626228).

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

31604621604560 is a wasteful number, since it uses less digits than its factorization.

31604621604560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395057770070 (or 395057770064 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 31604621604560 in words is "thirty-one trillion, six hundred four billion, six hundred twenty-one million, six hundred four thousand, five hundred sixty".