64904367680 has 56 divisors (see below), whose sum is σ = 159539147520. Its totient is φ = 25124267520.

The previous prime is 64904367679. The next prime is 64904367691. The reversal of 64904367680 is 8676340946.

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, 3261470 + ... + 3281309.

Almost surely, 2^64904367680 is an apocalyptic number.

It is an amenable number.

64904367680 is an abundant number, since it is smaller than the sum of its proper divisors (94634779840).

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

64904367680 is a wasteful number, since it uses less digits than its factorization.

64904367680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542827 (or 6542817 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 64904367680 in words is "sixty-four billion, nine hundred four million, three hundred sixty-seven thousand, six hundred eighty".