1916779166604 has 18 divisors (see below), whose sum is σ = 4845191782340. Its totient is φ = 638926388856.

The previous prime is 1916779166587. The next prime is 1916779166623. The reversal of 1916779166604 is 4066619776191.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26621932834 + ... + 26621932905.

Almost surely, 2^{1916779166604} is an apocalyptic number.

It is an amenable number.

1916779166604 is an abundant number, since it is smaller than the sum of its proper divisors (2928412615736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1916779166604 is a wasteful number, since it uses less digits than its factorization.

1916779166604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53243865749 (or 53243865744 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 1916779166604 in words is "one trillion, nine hundred sixteen billion, seven hundred seventy-nine million, one hundred sixty-six thousand, six hundred four".