55561011579 has 12 divisors (see below), whose sum is σ = 83022201600. Its totient is φ = 35763409584.

The previous prime is 55561011551. The next prime is 55561011587. The reversal of 55561011579 is 97511016555.

55561011579 is a `hidden beast` number, since 5 + 5 + 5 + 61 + 0 + 11 + 579 = 666.

It is not a de Polignac number, because 55561011579 - 2²⁰ = 55559963003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55561011509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106438459 + ... + 106438980.

It is an arithmetic number, because the mean of its divisors is an integer number (6918516800).

Almost surely, 2^55561011579 is an apocalyptic number.

55561011579 is a deficient number, since it is larger than the sum of its proper divisors (27461190021).

55561011579 is a wasteful number, since it uses less digits than its factorization.

55561011579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212877474 (or 212877471 counting only the distinct ones).

The product of its (nonzero) digits is 236250, while the sum is 45.

The spelling of 55561011579 in words is "fifty-five billion, five hundred sixty-one million, eleven thousand, five hundred seventy-nine".