55727921568 has 96 divisors (see below), whose sum is σ = 163295903232. Its totient is φ = 16494508800.

The previous prime is 55727921551. The next prime is 55727921581. The reversal of 55727921568 is 86512972755.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568228 + ... + 659043.

It is an arithmetic number, because the mean of its divisors is an integer number (1700998992).

Almost surely, 2^55727921568 is an apocalyptic number.

It is an amenable number.

55727921568 is an abundant number, since it is smaller than the sum of its proper divisors (107567981664).

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

55727921568 is a wasteful number, since it uses less digits than its factorization.

55727921568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227338 (or 1227330 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 57.

The spelling of 55727921568 in words is "fifty-five billion, seven hundred twenty-seven million, nine hundred twenty-one thousand, five hundred sixty-eight".