56556548820 has 72 divisors (see below), whose sum is σ = 175739152680. Its totient is φ = 14713896960.

The previous prime is 56556548803. The next prime is 56556548827. The reversal of 56556548820 is 2884565565.

It is a happy number.

56556548820 is a `hidden beast` number, since 5 + 6 + 556 + 5 + 4 + 8 + 82 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 903964356 + 55652584464 = 30066^2 + 235908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56556548827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3824365 + ... + 3839124.

It is an arithmetic number, because the mean of its divisors is an integer number (2440821565).

Almost surely, 2^56556548820 is an apocalyptic number.

It is an amenable number.

56556548820 is an abundant number, since it is smaller than the sum of its proper divisors (119182603860).

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

56556548820 is a wasteful number, since it uses less digits than its factorization.

56556548820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663545 (or 7663540 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 54.

The spelling of 56556548820 in words is "fifty-six billion, five hundred fifty-six million, five hundred forty-eight thousand, eight hundred twenty".