56199899879 has 4 divisors (see below), whose sum is σ = 56200775184. Its totient is φ = 56199024576.

The previous prime is 56199899869. The next prime is 56199899923. The reversal of 56199899879 is 97899899165.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56199899879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56199899809) 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, 333002 + ... + 472535.

It is an arithmetic number, because the mean of its divisors is an integer number (14050193796).

Almost surely, 2^56199899879 is an apocalyptic number.

56199899879 is a deficient number, since it is larger than the sum of its proper divisors (875305).

56199899879 is an equidigital number, since it uses as much as digits as its factorization.

56199899879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875304.

The product of its digits is 793618560, while the sum is 80.

The spelling of 56199899879 in words is "fifty-six billion, one hundred ninety-nine million, eight hundred ninety-nine thousand, eight hundred seventy-nine".