55897479855 has 36 divisors (see below), whose sum is σ = 112707576072. Its totient is φ = 25553132640.

The previous prime is 55897479823. The next prime is 55897479889.

55897479855 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55897479855 - 2⁵ = 55897479823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12672961 + ... + 12677370.

It is an arithmetic number, because the mean of its divisors is an integer number (3130766002).

Almost surely, 2^55897479855 is an apocalyptic number.

55897479855 is an abundant number, since it is smaller than the sum of its proper divisors (56810096217).

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

55897479855 is a wasteful number, since it uses less digits than its factorization.

55897479855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25350356 (or 25350346 counting only the distinct ones).

The product of its digits is 635040000, while the sum is 72.

The spelling of 55897479855 in words is "fifty-five billion, eight hundred ninety-seven million, four hundred seventy-nine thousand, eight hundred fifty-five".