56561357583 has 24 divisors (see below), whose sum is σ = 86013158400. Its totient is φ = 35717382864.

The previous prime is 56561357497. The next prime is 56561357591. The reversal of 56561357583 is 38575316565.

56561357583 is a `hidden beast` number, since 5 + 6 + 5 + 6 + 1 + 3 + 57 + 583 = 666.

It is not a de Polignac number, because 56561357583 - 2¹⁸ = 56561095439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561357483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1258188 + ... + 1302366.

It is an arithmetic number, because the mean of its divisors is an integer number (3583881600).

Almost surely, 2^56561357583 is an apocalyptic number.

56561357583 is a deficient number, since it is larger than the sum of its proper divisors (29451800817).

56561357583 is a wasteful number, since it uses less digits than its factorization.

56561357583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51691 (or 51688 counting only the distinct ones).

The product of its digits is 11340000, while the sum is 54.

The spelling of 56561357583 in words is "fifty-six billion, five hundred sixty-one million, three hundred fifty-seven thousand, five hundred eighty-three".