56215653440 has 56 divisors (see below), whose sum is σ = 133914657240. Its totient is φ = 22477672448.

The previous prime is 56215653433. The next prime is 56215653449. The reversal of 56215653440 is 4435651265.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27840924736 + 28374728704 = 166856^2 + 168448^2 .

It is not an unprimeable number, because it can be changed into a prime (56215653449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841094 + ... + 905466.

It is an arithmetic number, because the mean of its divisors is an integer number (2391333165).

Almost surely, 2^56215653440 is an apocalyptic number.

It is an amenable number.

56215653440 is an abundant number, since it is smaller than the sum of its proper divisors (77699003800).

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

56215653440 is a wasteful number, since it uses less digits than its factorization.

56215653440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67119 (or 67109 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 56215653440 in words is "fifty-six billion, two hundred fifteen million, six hundred fifty-three thousand, four hundred forty".