55561000556 has 24 divisors (see below), whose sum is σ = 101609840640. Its totient is φ = 26557109712.

The previous prime is 55561000549. The next prime is 55561000589. The reversal of 55561000556 is 65500016555.

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, 3428396 + ... + 3444563.

It is an arithmetic number, because the mean of its divisors is an integer number (4233743360).

Almost surely, 2^55561000556 is an apocalyptic number.

It is an amenable number.

55561000556 is a deficient number, since it is larger than the sum of its proper divisors (46048840084).

55561000556 is a wasteful number, since it uses less digits than its factorization.

55561000556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873053 (or 6873051 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 55561000556 in words is "fifty-five billion, five hundred sixty-one million, five hundred fifty-six", and thus it is an aban number.