64994965768 has 32 divisors (see below), whose sum is σ = 129289651200. Its totient is φ = 30544661952.

The previous prime is 64994965759. The next prime is 64994965799. The reversal of 64994965768 is 86756949946.

It is a self number, because there is not a number n which added to its sum of digits gives 64994965768.

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, 1664155 + ... + 1702762.

It is an arithmetic number, because the mean of its divisors is an integer number (4040301600).

Almost surely, 2^64994965768 is an apocalyptic number.

It is an amenable number.

64994965768 is a deficient number, since it is larger than the sum of its proper divisors (64294685432).

64994965768 is a wasteful number, since it uses less digits than its factorization.

64994965768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367069 (or 3367065 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 73.

The spelling of 64994965768 in words is "sixty-four billion, nine hundred ninety-four million, nine hundred sixty-five thousand, seven hundred sixty-eight".