56018220820 has 24 divisors (see below), whose sum is σ = 124558162344. Its totient is φ = 21089212416.

The previous prime is 56018220773. The next prime is 56018220859. The reversal of 56018220820 is 2802281065.

It can be written as a sum of positive squares in 4 ways, for example, as 10875569796 + 45142651024 = 104286^2 + 212468^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82379397 + ... + 82380076.

It is an arithmetic number, because the mean of its divisors is an integer number (5189923431).

Almost surely, 2^56018220820 is an apocalyptic number.

It is an amenable number.

56018220820 is an abundant number, since it is smaller than the sum of its proper divisors (68539941524).

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

56018220820 is a wasteful number, since it uses less digits than its factorization.

56018220820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164759499 (or 164759497 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 56018220820 in words is "fifty-six billion, eighteen million, two hundred twenty thousand, eight hundred twenty".