64633650636 has 24 divisors (see below), whose sum is σ = 153367986240. Its totient is φ = 21179388112.

The previous prime is 64633650619. The next prime is 64633650647. The reversal of 64633650636 is 63605633646.

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, 45644526 + ... + 45645941.

It is an arithmetic number, because the mean of its divisors is an integer number (6390332760).

Almost surely, 2^64633650636 is an apocalyptic number.

It is an amenable number.

64633650636 is an abundant number, since it is smaller than the sum of its proper divisors (88734335604).

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

64633650636 is a wasteful number, since it uses less digits than its factorization.

64633650636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91290533 (or 91290531 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 48.

The spelling of 64633650636 in words is "sixty-four billion, six hundred thirty-three million, six hundred fifty thousand, six hundred thirty-six".