56575563217561 has 4 divisors (see below), whose sum is σ = 56575581898000. Its totient is φ = 56575544537124.

The previous prime is 56575563217531. The next prime is 56575563217567. The reversal of 56575563217561 is 16571236557565.

56575563217561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56575563217561 - 2²⁷ = 56575428999833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56575563217493 and 56575563217502.

It is not an unprimeable number, because it can be changed into a prime (56575563217567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3636171 + ... + 11241568.

It is an arithmetic number, because the mean of its divisors is an integer number (14143895474500).

Almost surely, 2^{56575563217561} is an apocalyptic number.

It is an amenable number.

56575563217561 is a deficient number, since it is larger than the sum of its proper divisors (18680439).

56575563217561 is a wasteful number, since it uses less digits than its factorization.

56575563217561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18680438.

The product of its digits is 198450000, while the sum is 64.

The spelling of 56575563217561 in words is "fifty-six trillion, five hundred seventy-five billion, five hundred sixty-three million, two hundred seventeen thousand, five hundred sixty-one".