55120440879 has 24 divisors (see below), whose sum is σ = 91240448000. Its totient is φ = 31411557648.

The previous prime is 55120440871. The next prime is 55120440919. The reversal of 55120440879 is 97804402155.

55120440879 is a `hidden beast` number, since 5 + 5 + 120 + 440 + 87 + 9 = 666.

It is not a de Polignac number, because 55120440879 - 2³ = 55120440871 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 (55120440871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1168879 + ... + 1215120.

Almost surely, 2^55120440879 is an apocalyptic number.

55120440879 is a deficient number, since it is larger than the sum of its proper divisors (36120007121).

55120440879 is a wasteful number, since it uses less digits than its factorization.

55120440879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384379 (or 2384376 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 55120440879 in words is "fifty-five billion, one hundred twenty million, four hundred forty thousand, eight hundred seventy-nine".