56401920000 has 850 divisors, whose sum is σ = 222954130278. Its totient is φ = 14155776000.

The previous prime is 56401919971. The next prime is 56401920019. The reversal of 56401920000 is 2910465.

56401920000 is a `hidden beast` number, since 5 + 640 + 19 + 2 + 0 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 14353956864 + 42047963136 = 119808^2 + 205056^2 .

It is a tau number, because it is divible by the number of its divisors (850).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 3317759992 + ... + 3317760008.

Almost surely, 2^56401920000 is an apocalyptic number.

56401920000 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 56401920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111477065139).

56401920000 is an abundant number, since it is smaller than the sum of its proper divisors (166552210278).

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

56401920000 is an frugal number, since it uses more digits than its factorization.

56401920000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 56401920000 in words is "fifty-six billion, four hundred one million, nine hundred twenty thousand".