56515066051565 has 16 divisors (see below), whose sum is σ = 74047636740096. Its totient is φ = 41066156472000.

The previous prime is 56515066051541. The next prime is 56515066051579.

56515066051565 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-56515066051565 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 56515066051565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446307962 + ... + 446434571.

It is an arithmetic number, because the mean of its divisors is an integer number (4627977296256).

Almost surely, 2^{56515066051565} is an apocalyptic number.

56515066051565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56515066051565 is a deficient number, since it is larger than the sum of its proper divisors (17532570688531).

56515066051565 is a wasteful number, since it uses less digits than its factorization.

56515066051565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892743700.

The product of its (nonzero) digits is 20250000, while the sum is 56.

The spelling of 56515066051565 in words is "fifty-six trillion, five hundred fifteen billion, sixty-six million, fifty-one thousand, five hundred sixty-five".