55555500556 has 24 divisors (see below), whose sum is σ = 98117137440. Its totient is φ = 27523097472.

The previous prime is 55555500541. The next prime is 55555500563. The reversal of 55555500556 is 65500555555.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76230 + ... + 341938.

It is an arithmetic number, because the mean of its divisors is an integer number (4088214060).

Almost surely, 2^55555500556 is an apocalyptic number.

It is an amenable number.

55555500556 is a deficient number, since it is larger than the sum of its proper divisors (42561636884).

55555500556 is a wasteful number, since it uses less digits than its factorization.

55555500556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266193 (or 266191 counting only the distinct ones).

The product of its (nonzero) digits is 2343750, while the sum is 46.

The spelling of 55555500556 in words is "fifty-five billion, five hundred fifty-five million, five hundred thousand, five hundred fifty-six".