779078591131 has 4 divisors (see below), whose sum is σ = 779080356792. Its totient is φ = 779076825472.

The previous prime is 779078591099. The next prime is 779078591147. The reversal of 779078591131 is 131195870977.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 779078591131 - 2⁵ = 779078591099 is a prime.

It is a super-2 number, since 2×779078591131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779078591831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414996 + ... + 1315438.

It is an arithmetic number, because the mean of its divisors is an integer number (194770089198).

Almost surely, 2^779078591131 is an apocalyptic number.

779078591131 is a deficient number, since it is larger than the sum of its proper divisors (1765661).

779078591131 is an equidigital number, since it uses as much as digits as its factorization.

779078591131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765660.

The product of its (nonzero) digits is 3333960, while the sum is 58.

The spelling of 779078591131 in words is "seven hundred seventy-nine billion, seventy-eight million, five hundred ninety-one thousand, one hundred thirty-one".