56071813879 has 4 divisors (see below), whose sum is σ = 56072482600. Its totient is φ = 56071145160.

The previous prime is 56071813877. The next prime is 56071813901. The reversal of 56071813879 is 97831817065.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56071813879 - 2¹ = 56071813877 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 (56071813877) 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, 186912 + ... + 383509.

It is an arithmetic number, because the mean of its divisors is an integer number (14018120650).

Almost surely, 2^56071813879 is an apocalyptic number.

56071813879 is a deficient number, since it is larger than the sum of its proper divisors (668721).

56071813879 is an equidigital number, since it uses as much as digits as its factorization.

56071813879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668720.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 56071813879 in words is "fifty-six billion, seventy-one million, eight hundred thirteen thousand, eight hundred seventy-nine".