55564646556 has 48 divisors (see below), whose sum is σ = 129967342848. Its totient is φ = 18476390400.

The previous prime is 55564646549. The next prime is 55564646567. The reversal of 55564646556 is 65564646555.

It is a happy number.

It is a super-2 number, since 2×55564646556² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55564646496 and 55564646505.

It is a congruent number.

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, 11404801 + ... + 11409671.

It is an arithmetic number, because the mean of its divisors is an integer number (2707652976).

Almost surely, 2^55564646556 is an apocalyptic number.

It is an amenable number.

55564646556 is an abundant number, since it is smaller than the sum of its proper divisors (74402696292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55564646556 is a wasteful number, since it uses less digits than its factorization.

55564646556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002 (or 7000 counting only the distinct ones).

The product of its digits is 64800000, while the sum is 57.

Subtracting 55564646556 from its reverse (65564646555), we obtain a palindrome (9999999999).

The spelling of 55564646556 in words is "fifty-five billion, five hundred sixty-four million, six hundred forty-six thousand, five hundred fifty-six".