56555576028 has 144 divisors (see below), whose sum is σ = 169856610560. Its totient is φ = 16118434944.

The previous prime is 56555576023. The next prime is 56555576057. The reversal of 56555576028 is 82067555565.

56555576028 is a `hidden beast` number, since 5 + 6 + 5 + 5 + 557 + 60 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56555576023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2772675 + ... + 2792997.

Almost surely, 2^56555576028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56555576028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84928305280).

56555576028 is an abundant number, since it is smaller than the sum of its proper divisors (113301034532).

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

56555576028 is a wasteful number, since it uses less digits than its factorization.

56555576028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20758 (or 20744 counting only the distinct ones).

The product of its (nonzero) digits is 12600000, while the sum is 54.

The spelling of 56555576028 in words is "fifty-six billion, five hundred fifty-five million, five hundred seventy-six thousand, twenty-eight".