56643992000 has 112 divisors (see below), whose sum is σ = 140592291840. Its totient is φ = 22606976000.

The previous prime is 56643991991. The next prime is 56643992029. The reversal of 56643992000 is 29934665.

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 15 ways as a sum of consecutive naturals, for example, 3680321 + ... + 3695679.

It is an arithmetic number, because the mean of its divisors is an integer number (1255288320).

Almost surely, 2^56643992000 is an apocalyptic number.

56643992000 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 56643992000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70296145920).

56643992000 is an abundant number, since it is smaller than the sum of its proper divisors (83948299840).

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

56643992000 is a wasteful number, since it uses less digits than its factorization.

56643992000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15847 (or 15827 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 56643992000 in words is "fifty-six billion, six hundred forty-three million, nine hundred ninety-two thousand".