56561388316565 has 8 divisors (see below), whose sum is σ = 74043999250848. Its totient is φ = 41135555139280.

The previous prime is 56561388316561. The next prime is 56561388316567.

It is a happy number.

56561388316565 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56561388316565 - 2² = 56561388316561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56561388316495 and 56561388316504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561388316561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514194439187 + ... + 514194439296.

It is an arithmetic number, because the mean of its divisors is an integer number (9255499906356).

Almost surely, 2^{56561388316565} is an apocalyptic number.

56561388316565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56561388316565 is a deficient number, since it is larger than the sum of its proper divisors (17482610934283).

56561388316565 is a wasteful number, since it uses less digits than its factorization.

56561388316565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028388878499.

The product of its digits is 466560000, while the sum is 68.

The spelling of 56561388316565 in words is "fifty-six trillion, five hundred sixty-one billion, three hundred eighty-eight million, three hundred sixteen thousand, five hundred sixty-five".