56291571840 has 256 divisors, whose sum is σ = 207953879040. Its totient is φ = 12685209600.

The previous prime is 56291571829. The next prime is 56291571841. The reversal of 56291571840 is 4817519265.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 56291571840.

It is not an unprimeable number, because it can be changed into a prime (56291571841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 924745 + ... + 983735.

It is an arithmetic number, because the mean of its divisors is an integer number (812319840).

Almost surely, 2^56291571840 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 56291571840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103976939520).

56291571840 is an abundant number, since it is smaller than the sum of its proper divisors (151662307200).

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

56291571840 is a wasteful number, since it uses less digits than its factorization.

56291571840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59091 (or 59079 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 56291571840 in words is "fifty-six billion, two hundred ninety-one million, five hundred seventy-one thousand, eight hundred forty".