11775715155 has 24 divisors (see below), whose sum is σ = 20414983680. Its totient is φ = 6279229440.

The previous prime is 11775715129. The next prime is 11775715199. The reversal of 11775715155 is 55151757711.

11775715155 is a `hidden beast` number, since 1 + 1 + 77 + 571 + 5 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 11775715155 - 2⁷ = 11775715027 is a prime.

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 11775715155.

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, 261331 + ... + 303059.

It is an arithmetic number, because the mean of its divisors is an integer number (850624320).

Almost surely, 2^11775715155 is an apocalyptic number.

11775715155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11775715155 is a deficient number, since it is larger than the sum of its proper divisors (8639268525).

11775715155 is a wasteful number, since it uses less digits than its factorization.

11775715155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48011 (or 48008 counting only the distinct ones).

The product of its digits is 214375, while the sum is 45.

The spelling of 11775715155 in words is "eleven billion, seven hundred seventy-five million, seven hundred fifteen thousand, one hundred fifty-five".