56516050555565 has 4 divisors (see below), whose sum is σ = 67819260666684. Its totient is φ = 45212840444448.

The previous prime is 56516050555519. The next prime is 56516050555567. The reversal of 56516050555565 is 56555505061565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14036067432676 + 42479983122889 = 3746474^2 + 6517667^2 .

It is a cyclic number.

It is not a de Polignac number, because 56516050555565 - 2³⁴ = 56498870686381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56516050555567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5651605055552 + ... + 5651605055561.

It is an arithmetic number, because the mean of its divisors is an integer number (16954815166671).

Almost surely, 2^{56516050555565} is an apocalyptic number.

It is an amenable number.

56516050555565 is a deficient number, since it is larger than the sum of its proper divisors (11303210111119).

56516050555565 is a wasteful number, since it uses less digits than its factorization.

56516050555565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303210111118.

The product of its (nonzero) digits is 84375000, while the sum is 59.

The spelling of 56516050555565 in words is "fifty-six trillion, five hundred sixteen billion, fifty million, five hundred fifty-five thousand, five hundred sixty-five".