64963581992 has 32 divisors (see below), whose sum is σ = 128987147520. Its totient is φ = 30567463680.

The previous prime is 64963581983. The next prime is 64963582063. The reversal of 64963581992 is 29918536946.

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, 1373603 + ... + 1420109.

It is an arithmetic number, because the mean of its divisors is an integer number (4030848360).

Almost surely, 2^64963581992 is an apocalyptic number.

It is an amenable number.

64963581992 is a deficient number, since it is larger than the sum of its proper divisors (64023565528).

64963581992 is a wasteful number, since it uses less digits than its factorization.

64963581992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56801 (or 56797 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 62.

The spelling of 64963581992 in words is "sixty-four billion, nine hundred sixty-three million, five hundred eighty-one thousand, nine hundred ninety-two".