56561526837 has 24 divisors (see below), whose sum is σ = 85267353600. Its totient is φ = 36061790688.

The previous prime is 56561526823. The next prime is 56561526869. The reversal of 56561526837 is 73862516565.

It is a happy number.

56561526837 is a `hidden beast` number, since 56 + 5 + 61 + 526 + 8 + 3 + 7 = 666.

It is not a de Polignac number, because 56561526837 - 2²⁴ = 56544749621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561524837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1317964 + ... + 1360202.

It is an arithmetic number, because the mean of its divisors is an integer number (3552806400).

Almost surely, 2^56561526837 is an apocalyptic number.

It is an amenable number.

56561526837 is a deficient number, since it is larger than the sum of its proper divisors (28705826763).

56561526837 is a wasteful number, since it uses less digits than its factorization.

56561526837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48737 (or 48734 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 56561526837 in words is "fifty-six billion, five hundred sixty-one million, five hundred twenty-six thousand, eight hundred thirty-seven".