54639758664 has 24 divisors (see below), whose sum is σ = 147982679910. Its totient is φ = 18213252864.

The previous prime is 54639758653. The next prime is 54639758669. The reversal of 54639758664 is 46685793645.

54639758664 is a `hidden beast` number, since 5 + 46 + 3 + 9 + 7 + 586 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53341597764 + 1298160900 = 230958^2 + 36030^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (54639758669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379442697 + ... + 379442840.

Almost surely, 2^54639758664 is an apocalyptic number.

It is an amenable number.

54639758664 is an abundant number, since it is smaller than the sum of its proper divisors (93342921246).

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

54639758664 is a wasteful number, since it uses less digits than its factorization.

54639758664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758885549 (or 758885542 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 54639758664 in words is "fifty-four billion, six hundred thirty-nine million, seven hundred fifty-eight thousand, six hundred sixty-four".