979933815845 has 4 divisors (see below), whose sum is σ = 1175920579020. Its totient is φ = 783947052672.

The previous prime is 979933815803. The next prime is 979933815851. The reversal of 979933815845 is 548518339979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 626469084004 + 353464731841 = 791498^2 + 594529^2 .

It is a cyclic number.

It is not a de Polignac number, because 979933815845 - 2³⁰ = 978860074021 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97993381580 + ... + 97993381589.

It is an arithmetic number, because the mean of its divisors is an integer number (293980144755).

Almost surely, 2^979933815845 is an apocalyptic number.

It is an amenable number.

979933815845 is a deficient number, since it is larger than the sum of its proper divisors (195986763175).

979933815845 is a wasteful number, since it uses less digits than its factorization.

979933815845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195986763174.

The product of its digits is 293932800, while the sum is 71.

The spelling of 979933815845 in words is "nine hundred seventy-nine billion, nine hundred thirty-three million, eight hundred fifteen thousand, eight hundred forty-five".