556555655 has 4 divisors (see below), whose sum is σ = 667866792. Its totient is φ = 445244520.

The previous prime is 556555651. The next prime is 556555661.

556555655 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 556555655 - 2² = 556555651 is a prime.

It is a super-2 number, since 2×556555655² = 619508394224958050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556555651) 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, 55655561 + ... + 55655570.

It is an arithmetic number, because the mean of its divisors is an integer number (166966698).

Almost surely, 2^556555655 is an apocalyptic number.

556555655 is a deficient number, since it is larger than the sum of its proper divisors (111311137).

556555655 is a wasteful number, since it uses less digits than its factorization.

556555655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111311136.

The product of its digits is 2812500, while the sum is 47.

The square root of 556555655 is about 23591.4318132664. The cubic root of 556555655 is about 822.5636871999.

The spelling of 556555655 in words is "five hundred fifty-six million, five hundred fifty-five thousand, six hundred fifty-five".