2978558368689 has 16 divisors (see below), whose sum is σ = 4180653550400. Its totient is φ = 1881095420736.

The previous prime is 2978558368661. The next prime is 2978558368699. The reversal of 2978558368689 is 9868638558792.

It is not a de Polignac number, because 2978558368689 - 2²⁵ = 2978524814257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978558368699) 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, 283234 + ... + 2457099.

It is an arithmetic number, because the mean of its divisors is an integer number (261290846900).

Almost surely, 2^{2978558368689} is an apocalyptic number.

It is an amenable number.

2978558368689 is a deficient number, since it is larger than the sum of its proper divisors (1202095181711).

2978558368689 is a wasteful number, since it uses less digits than its factorization.

2978558368689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759424.

The product of its digits is 12541132800, while the sum is 84.

The spelling of 2978558368689 in words is "two trillion, nine hundred seventy-eight billion, five hundred fifty-eight million, three hundred sixty-eight thousand, six hundred eighty-nine".