56881004544 has 720 divisors, whose sum is σ = 211063518848. Its totient is φ = 14906032128.

The previous prime is 56881004491. The next prime is 56881004561. The reversal of 56881004544 is 44540018865.

It is a happy number.

56881004544 is a `hidden beast` number, since 568 + 8 + 1 + 0 + 0 + 45 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 56881004544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362299314 + ... + 362299470.

Almost surely, 2^56881004544 is an apocalyptic number.

56881004544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56881004544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105531759424).

56881004544 is an abundant number, since it is smaller than the sum of its proper divisors (154182514304).

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

56881004544 is an equidigital number, since it uses as much as digits as its factorization.

56881004544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 56881004544 in words is "fifty-six billion, eight hundred eighty-one million, four thousand, five hundred forty-four".