55806564 has 48 divisors (see below), whose sum is σ = 142490880. Its totient is φ = 16859040.

The previous prime is 55806559. The next prime is 55806577. The reversal of 55806564 is 46560855.

It is a super-2 number, since 2×55806564² = 6228745170972192, which contains 22 as substring.

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, 81367 + ... + 82049.

It is an arithmetic number, because the mean of its divisors is an integer number (2968560).

Almost surely, 2^55806564 is an apocalyptic number.

It is an amenable number.

55806564 is an abundant number, since it is smaller than the sum of its proper divisors (86684316).

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

55806564 is a wasteful number, since it uses less digits than its factorization.

55806564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 55806564 is about 7470.3791068459. The cubic root of 55806564 is about 382.1452167571.

The spelling of 55806564 in words is "fifty-five million, eight hundred six thousand, five hundred sixty-four".