56521382540 has 96 divisors (see below), whose sum is σ = 139504425984. Its totient is φ = 18835165440.

The previous prime is 56521382531. The next prime is 56521382563. The reversal of 56521382540 is 4528312565.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 758345 + ... + 829535.

It is an arithmetic number, because the mean of its divisors is an integer number (1453171104).

Almost surely, 2^56521382540 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 56521382540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69752212992).

56521382540 is an abundant number, since it is smaller than the sum of its proper divisors (82983043444).

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

56521382540 is a wasteful number, since it uses less digits than its factorization.

56521382540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71367 (or 71365 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 56521382540 in words is "fifty-six billion, five hundred twenty-one million, three hundred eighty-two thousand, five hundred forty".