56581089871800 has 384 divisors, whose sum is σ = 190275493464000. Its totient is φ = 13825888911360.

The previous prime is 56581089871769. The next prime is 56581089871837. The reversal of 56581089871800 is 817898018565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2065215702 + ... + 2065243098.

Almost surely, 2^{56581089871800} is an apocalyptic number.

56581089871800 is a gapful number since it is divisible by the number (50) 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 56581089871800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95137746732000).

56581089871800 is an abundant number, since it is smaller than the sum of its proper divisors (133694403592200).

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

56581089871800 is a wasteful number, since it uses less digits than its factorization.

56581089871800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29355 (or 29346 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 66.

The spelling of 56581089871800 in words is "fifty-six trillion, five hundred eighty-one billion, eighty-nine million, eight hundred seventy-one thousand, eight hundred".