55807243155 has 24 divisors (see below), whose sum is σ = 100068162480. Its totient is φ = 28737522240.

The previous prime is 55807243147. The next prime is 55807243199. The reversal of 55807243155 is 55134270855.

55807243155 is a `hidden beast` number, since 558 + 0 + 7 + 2 + 43 + 1 + 55 = 666.

It is not a de Polignac number, because 55807243155 - 2³ = 55807243147 is a prime.

It is a super-2 number, since 2×55807243155² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55807243155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21380781 + ... + 21383390.

It is an arithmetic number, because the mean of its divisors is an integer number (4169506770).

Almost surely, 2^55807243155 is an apocalyptic number.

55807243155 is a deficient number, since it is larger than the sum of its proper divisors (44260919325).

55807243155 is a wasteful number, since it uses less digits than its factorization.

55807243155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42764211 (or 42764208 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 55807243155 in words is "fifty-five billion, eight hundred seven million, two hundred forty-three thousand, one hundred fifty-five".