978565565879 has 16 divisors (see below), whose sum is σ = 1098437130144. Its totient is φ = 864178224000.

The previous prime is 978565565851. The next prime is 978565565993.

978565565879 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 978565565879 - 2²⁴ = 978548788663 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 (978565565479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8250524 + ... + 8368289.

It is an arithmetic number, because the mean of its divisors is an integer number (68652320634).

Almost surely, 2^978565565879 is an apocalyptic number.

978565565879 is a deficient number, since it is larger than the sum of its proper divisors (119871564265).

978565565879 is a wasteful number, since it uses less digits than its factorization.

978565565879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618978.

The product of its digits is 5715360000, while the sum is 80.

The spelling of 978565565879 in words is "nine hundred seventy-eight billion, five hundred sixty-five million, five hundred sixty-five thousand, eight hundred seventy-nine".