55764778081332 has 12 divisors (see below), whose sum is σ = 130117815523136. Its totient is φ = 18588259360440.

The previous prime is 55764778081321. The next prime is 55764778081333. The reversal of 55764778081332 is 23318087746755.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55764778081333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2323532420044 + ... + 2323532420067.

Almost surely, 2^{55764778081332} is an apocalyptic number.

It is an amenable number.

55764778081332 is an abundant number, since it is smaller than the sum of its proper divisors (74353037441804).

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

55764778081332 is a wasteful number, since it uses less digits than its factorization.

55764778081332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647064840118 (or 4647064840116 counting only the distinct ones).

The product of its (nonzero) digits is 237081600, while the sum is 66.

The spelling of 55764778081332 in words is "fifty-five trillion, seven hundred sixty-four billion, seven hundred seventy-eight million, eighty-one thousand, three hundred thirty-two".