56571778339 has 8 divisors (see below), whose sum is σ = 59901977520. Its totient is φ = 53241851136.

The previous prime is 56571778331. The next prime is 56571778349. The reversal of 56571778339 is 93387717565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56571778339 - 2³ = 56571778331 is a prime.

It is a super-2 number, since 2×56571778339² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56571778331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492172 + ... + 596134.

It is an arithmetic number, because the mean of its divisors is an integer number (7487747190).

Almost surely, 2^56571778339 is an apocalyptic number.

56571778339 is a deficient number, since it is larger than the sum of its proper divisors (3330199181).

56571778339 is a wasteful number, since it uses less digits than its factorization.

56571778339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135989.

The product of its digits is 33339600, while the sum is 61.

The spelling of 56571778339 in words is "fifty-six billion, five hundred seventy-one million, seven hundred seventy-eight thousand, three hundred thirty-nine".