320056640664 has 32 divisors (see below), whose sum is σ = 800177824320. Its totient is φ = 106680717216.

The previous prime is 320056640633. The next prime is 320056640711. The reversal of 320056640664 is 466046650023.

It is a congruent number.

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, 260739 + ... + 841485.

It is an arithmetic number, because the mean of its divisors is an integer number (25005557010).

Almost surely, 2^320056640664 is an apocalyptic number.

It is an amenable number.

320056640664 is an abundant number, since it is smaller than the sum of its proper divisors (480121183656).

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

320056640664 is a wasteful number, since it uses less digits than its factorization.

320056640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603719 (or 603715 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 320056640664 in words is "three hundred twenty billion, fifty-six million, six hundred forty thousand, six hundred sixty-four".