56047721536 has 63 divisors (see below), whose sum is σ = 112716478783. Its totient is φ = 27651699200.

The previous prime is 56047721531. The next prime is 56047721563. The reversal of 56047721536 is 63512774065.

The square root of 56047721536 is 236744.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 46156225600 + 9891495936 = 214840^2 + 99456^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56047721531) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 191289006 + ... + 191289298.

Almost surely, 2^56047721536 is an apocalyptic number.

56047721536 is the 236744-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56047721536

56047721536 is an abundant number, since it is smaller than the sum of its proper divisors (56668757247).

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

56047721536 is an frugal number, since it uses more digits than its factorization.

56047721536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 56047721536 in words is "fifty-six billion, forty-seven million, seven hundred twenty-one thousand, five hundred thirty-six".