56554645565 has 12 divisors (see below), whose sum is σ = 74596045692. Its totient is φ = 41130650880.

The previous prime is 56554645541. The next prime is 56554645579.

56554645565 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 29813892889 + 26740752676 = 172667^2 + 163526^2 .

It is not a de Polignac number, because 56554645565 - 2¹² = 56554641469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56554645565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46738772 + ... + 46739981.

It is an arithmetic number, because the mean of its divisors is an integer number (6216337141).

Almost surely, 2^56554645565 is an apocalyptic number.

56554645565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56554645565 is a deficient number, since it is larger than the sum of its proper divisors (18041400127).

56554645565 is a wasteful number, since it uses less digits than its factorization.

56554645565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93478780 (or 93478769 counting only the distinct ones).

The product of its digits is 54000000, while the sum is 56.

The spelling of 56554645565 in words is "fifty-six billion, five hundred fifty-four million, six hundred forty-five thousand, five hundred sixty-five".