31604621604664 has 8 divisors (see below), whose sum is σ = 59258665508760. Its totient is φ = 15802310802328.

The previous prime is 31604621604629. The next prime is 31604621604679. The reversal of 31604621604664 is 46640612640613.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975288850284 + ... + 1975288850299.

It is an arithmetic number, because the mean of its divisors is an integer number (7407333188595).

Almost surely, 2^{31604621604664} is an apocalyptic number.

It is an amenable number.

31604621604664 is a deficient number, since it is larger than the sum of its proper divisors (27654043904096).

31604621604664 is a wasteful number, since it uses less digits than its factorization.

31604621604664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950577700589 (or 3950577700585 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 49.

The spelling of 31604621604664 in words is "thirty-one trillion, six hundred four billion, six hundred twenty-one million, six hundred four thousand, six hundred sixty-four".