55768811644720 has 80 divisors (see below), whose sum is σ = 136510968096000. Its totient is φ = 21129706669824.

The previous prime is 55768811644699. The next prime is 55768811644757. The reversal of 55768811644720 is 2744611886755.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×55768811644720² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5359941 + ... + 11843419.

It is an arithmetic number, because the mean of its divisors is an integer number (1706387101200).

Almost surely, 2^{55768811644720} is an apocalyptic number.

It is an amenable number.

55768811644720 is an abundant number, since it is smaller than the sum of its proper divisors (80742156451280).

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

55768811644720 is a wasteful number, since it uses less digits than its factorization.

55768811644720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489170 (or 6489164 counting only the distinct ones).

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 55768811644720 in words is "fifty-five trillion, seven hundred sixty-eight billion, eight hundred eleven million, six hundred forty-four thousand, seven hundred twenty".