978553355879 has 8 divisors (see below), whose sum is σ = 1067520138240. Its totient is φ = 889587804600.

The previous prime is 978553355867. The next prime is 978553355891.

978553355879 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (978553355867) and next prime (978553355891).

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

It is not a de Polignac number, because 978553355879 - 2²⁰ = 978552307303 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 (978553355839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358752 + ... + 2742410.

It is an arithmetic number, because the mean of its divisors is an integer number (133440017280).

Almost surely, 2^978553355879 is an apocalyptic number.

978553355879 is a deficient number, since it is larger than the sum of its proper divisors (88966782361).

978553355879 is a wasteful number, since it uses less digits than its factorization.

978553355879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615541.

The product of its digits is 1428840000, while the sum is 74.

The spelling of 978553355879 in words is "nine hundred seventy-eight billion, five hundred fifty-three million, three hundred fifty-five thousand, eight hundred seventy-nine".