56115111055505 has 4 divisors (see below), whose sum is σ = 67338133266612. Its totient is φ = 44892088844400.

The previous prime is 56115111055447. The next prime is 56115111055609. The reversal of 56115111055505 is 50555011151165.

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 19349854929409 + 36765256126096 = 4398847^2 + 6063436^2 .

It is not a de Polignac number, because 56115111055505 - 2⁸ = 56115111055249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5611511105546 + ... + 5611511105555.

It is an arithmetic number, because the mean of its divisors is an integer number (16834533316653).

Almost surely, 2^{56115111055505} is an apocalyptic number.

It is an amenable number.

56115111055505 is a deficient number, since it is larger than the sum of its proper divisors (11223022211107).

56115111055505 is a wasteful number, since it uses less digits than its factorization.

56115111055505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11223022211106.

The product of its (nonzero) digits is 93750, while the sum is 41.

The spelling of 56115111055505 in words is "fifty-six trillion, one hundred fifteen billion, one hundred eleven million, fifty-five thousand, five hundred five".