56241663021 has 12 divisors (see below), whose sum is σ = 81755398972. Its totient is φ = 37255622976.

The previous prime is 56241663019. The next prime is 56241663043. The reversal of 56241663021 is 12036614265.

56241663021 is a `hidden beast` number, since 5 + 6 + 2 + 4 + 16 + 630 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29381730921 + 26859932100 = 171411^2 + 163890^2 .

It is not a de Polignac number, because 56241663021 - 2¹ = 56241663019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56241663001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19900096 + ... + 19902921.

Almost surely, 2^56241663021 is an apocalyptic number.

It is an amenable number.

56241663021 is a deficient number, since it is larger than the sum of its proper divisors (25513735951).

56241663021 is a wasteful number, since it uses less digits than its factorization.

56241663021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39803180 (or 39803177 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 56241663021 in words is "fifty-six billion, two hundred forty-one million, six hundred sixty-three thousand, twenty-one".