55764656639 has 16 divisors (see below), whose sum is σ = 57409763040. Its totient is φ = 54144245760.

The previous prime is 55764656611. The next prime is 55764656653. The reversal of 55764656639 is 93665646755.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55764656639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55764656669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7129859 + ... + 7137675.

It is an arithmetic number, because the mean of its divisors is an integer number (3588110190).

Almost surely, 2^55764656639 is an apocalyptic number.

55764656639 is a deficient number, since it is larger than the sum of its proper divisors (1645106401).

55764656639 is a wasteful number, since it uses less digits than its factorization.

55764656639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9370.

The product of its digits is 122472000, while the sum is 62.

The spelling of 55764656639 in words is "fifty-five billion, seven hundred sixty-four million, six hundred fifty-six thousand, six hundred thirty-nine".