64994473612 has 12 divisors (see below), whose sum is σ = 113759976456. Its totient is φ = 32491623200.

The previous prime is 64994473603. The next prime is 64994473637. The reversal of 64994473612 is 21637449946.

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, 1377298 + ... + 1423705.

It is an arithmetic number, because the mean of its divisors is an integer number (9479998038).

Almost surely, 2^64994473612 is an apocalyptic number.

It is an amenable number.

64994473612 is a deficient number, since it is larger than the sum of its proper divisors (48765502844).

64994473612 is a wasteful number, since it uses less digits than its factorization.

64994473612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806808 (or 2806806 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 64994473612 in words is "sixty-four billion, nine hundred ninety-four million, four hundred seventy-three thousand, six hundred twelve".