56479987877 has 4 divisors (see below), whose sum is σ = 57275480736. Its totient is φ = 55684495020.

The previous prime is 56479987873. The next prime is 56479987903. The reversal of 56479987877 is 77878997465.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77878997465 = 5 ⋅15575799493.

It is a cyclic number.

It is not a de Polignac number, because 56479987877 - 2² = 56479987873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56479987798 and 56479987807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56479987873) by changing a digit.

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, 397746323 + ... + 397746464.

It is an arithmetic number, because the mean of its divisors is an integer number (14318870184).

Almost surely, 2^56479987877 is an apocalyptic number.

It is an amenable number.

56479987877 is a deficient number, since it is larger than the sum of its proper divisors (795492859).

56479987877 is an equidigital number, since it uses as much as digits as its factorization.

56479987877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795492858.

The product of its digits is 1493614080, while the sum is 77.

The spelling of 56479987877 in words is "fifty-six billion, four hundred seventy-nine million, nine hundred eighty-seven thousand, eight hundred seventy-seven".