56377881515 has 4 divisors (see below), whose sum is σ = 67653457824. Its totient is φ = 45102305208.

The previous prime is 56377881487. The next prime is 56377881517. The reversal of 56377881515 is 51518877365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51518877365 = 5 ⋅10303775473.

It is a cyclic number.

It is not a de Polignac number, because 56377881515 - 2¹⁰ = 56377880491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56377881517) 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, 5637788147 + ... + 5637788156.

It is an arithmetic number, because the mean of its divisors is an integer number (16913364456).

Almost surely, 2^56377881515 is an apocalyptic number.

56377881515 is a deficient number, since it is larger than the sum of its proper divisors (11275576309).

56377881515 is a wasteful number, since it uses less digits than its factorization.

56377881515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11275576308.

The product of its digits is 7056000, while the sum is 56.

The spelling of 56377881515 in words is "fifty-six billion, three hundred seventy-seven million, eight hundred eighty-one thousand, five hundred fifteen".