556161555 has 16 divisors (see below), whose sum is σ = 890152704. Its totient is φ = 296521440.

The previous prime is 556161517. The next prime is 556161587. The reversal of 556161555 is 555161655.

It is not a de Polignac number, because 556161555 - 2⁷ = 556161427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78052 + ... + 84878.

It is an arithmetic number, because the mean of its divisors is an integer number (55634544).

Almost surely, 2^556161555 is an apocalyptic number.

556161555 is a deficient number, since it is larger than the sum of its proper divisors (333991149).

556161555 is a wasteful number, since it uses less digits than its factorization.

556161555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12266.

The product of its digits is 112500, while the sum is 39.

The square root of 556161555 is about 23583.0777253521. The cubic root of 556161555 is about 822.3694874571.

The spelling of 556161555 in words is "five hundred fifty-six million, one hundred sixty-one thousand, five hundred fifty-five".