791613876989 has 24 divisors (see below), whose sum is σ = 886889494440. Its totient is φ = 705412012032.

The previous prime is 791613876983. The next prime is 791613877079. The reversal of 791613876989 is 989678316197.

It can be written as a sum of positive squares in 12 ways, for example, as 195954072889 + 595659804100 = 442667^2 + 771790^2 .

It is not a de Polignac number, because 791613876989 - 2³² = 787318909693 is a prime.

It is a super-2 number, since 2×791613876989² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791613876983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58574897 + ... + 58588409.

It is an arithmetic number, because the mean of its divisors is an integer number (36953728935).

Almost surely, 2^791613876989 is an apocalyptic number.

It is an amenable number.

791613876989 is a deficient number, since it is larger than the sum of its proper divisors (95275617451).

791613876989 is a wasteful number, since it uses less digits than its factorization.

791613876989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25521 (or 25508 counting only the distinct ones).

The product of its digits is 246903552, while the sum is 74.

The spelling of 791613876989 in words is "seven hundred ninety-one billion, six hundred thirteen million, eight hundred seventy-six thousand, nine hundred eighty-nine".