56561357567 has 16 divisors (see below), whose sum is σ = 66615484320. Its totient is φ = 47345664000.

The previous prime is 56561357497. The next prime is 56561357591. The reversal of 56561357567 is 76575316565.

It is a cyclic number.

It is not a de Polignac number, because 56561357567 - 2⁸ = 56561357311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561357467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435842 + ... + 550527.

It is an arithmetic number, because the mean of its divisors is an integer number (4163467770).

Almost surely, 2^56561357567 is an apocalyptic number.

56561357567 is a deficient number, since it is larger than the sum of its proper divisors (10054126753).

56561357567 is a wasteful number, since it uses less digits than its factorization.

56561357567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986794.

The product of its digits is 19845000, while the sum is 56.

The spelling of 56561357567 in words is "fifty-six billion, five hundred sixty-one million, three hundred fifty-seven thousand, five hundred sixty-seven".