56561205825 has 24 divisors (see below), whose sum is σ = 103905031200. Its totient is φ = 30165976080.

The previous prime is 56561205821. The next prime is 56561205851. The reversal of 56561205825 is 52850216565.

56561205825 is a `hidden beast` number, since 5 + 6 + 5 + 61 + 2 + 0 + 582 + 5 = 666.

It is not a de Polignac number, because 56561205825 - 2² = 56561205821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (56561205821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41896515 + ... + 41897864.

It is an arithmetic number, because the mean of its divisors is an integer number (4329376300).

Almost surely, 2^56561205825 is an apocalyptic number.

It is an amenable number.

56561205825 is a deficient number, since it is larger than the sum of its proper divisors (47343825375).

56561205825 is a wasteful number, since it uses less digits than its factorization.

56561205825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83794398 (or 83794387 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 56561205825 in words is "fifty-six billion, five hundred sixty-one million, two hundred five thousand, eight hundred twenty-five".