56556166099 has 4 divisors (see below), whose sum is σ = 59532806440. Its totient is φ = 53579525760.

The previous prime is 56556166057. The next prime is 56556166103. The reversal of 56556166099 is 99066165565.

56556166099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56556166099 - 2¹⁷ = 56556035027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56556166019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488320142 + ... + 1488320179.

It is an arithmetic number, because the mean of its divisors is an integer number (14883201610).

Almost surely, 2^56556166099 is an apocalyptic number.

56556166099 is a deficient number, since it is larger than the sum of its proper divisors (2976640341).

56556166099 is a wasteful number, since it uses less digits than its factorization.

56556166099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976640340.

The product of its (nonzero) digits is 13122000, while the sum is 58.

The spelling of 56556166099 in words is "fifty-six billion, five hundred fifty-six million, one hundred sixty-six thousand, ninety-nine".