64629812944 has 20 divisors (see below), whose sum is σ = 125875872000. Its totient is φ = 32145716960.

The previous prime is 64629812927. The next prime is 64629812983. The reversal of 64629812944 is 44921892646.

64629812944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 10571194 + ... + 10577305.

It is an arithmetic number, because the mean of its divisors is an integer number (6293793600).

Almost surely, 2^64629812944 is an apocalyptic number.

It is an amenable number.

64629812944 is a deficient number, since it is larger than the sum of its proper divisors (61246059056).

64629812944 is a wasteful number, since it uses less digits than its factorization.

64629812944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148698 (or 21148692 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 64629812944 in words is "sixty-four billion, six hundred twenty-nine million, eight hundred twelve thousand, nine hundred forty-four".