77187055855 has 16 divisors (see below), whose sum is σ = 113999344704. Its totient is φ = 48856861440.

The previous prime is 77187055849. The next prime is 77187055871. The reversal of 77187055855 is 55855078177.

It is a happy number.

It is not a de Polignac number, because 77187055855 - 2¹¹ = 77187053807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77187055855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84820486 + ... + 84821395.

It is an arithmetic number, because the mean of its divisors is an integer number (7124959044).

Almost surely, 2^77187055855 is an apocalyptic number.

77187055855 is a deficient number, since it is larger than the sum of its proper divisors (36812288849).

77187055855 is a wasteful number, since it uses less digits than its factorization.

77187055855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169641906.

The product of its (nonzero) digits is 13720000, while the sum is 58.

The spelling of 77187055855 in words is "seventy-seven billion, one hundred eighty-seven million, fifty-five thousand, eight hundred fifty-five".