56577761440 has 24 divisors (see below), whose sum is σ = 133664961780. Its totient is φ = 22631104512.

The previous prime is 56577761437. The next prime is 56577761447. The reversal of 56577761440 is 4416777565.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53599658256 + 2978103184 = 231516^2 + 54572^2 .

It is not an unprimeable number, because it can be changed into a prime (56577761447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176805345 + ... + 176805664.

Almost surely, 2^56577761440 is an apocalyptic number.

It is an amenable number.

56577761440 is an abundant number, since it is smaller than the sum of its proper divisors (77087200340).

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

56577761440 is a wasteful number, since it uses less digits than its factorization.

56577761440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353611024 (or 353611016 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 56577761440 in words is "fifty-six billion, five hundred seventy-seven million, seven hundred sixty-one thousand, four hundred forty".