779796613517 has 4 divisors (see below), whose sum is σ = 779936342556. Its totient is φ = 779656884480.

The previous prime is 779796613507. The next prime is 779796613529. The reversal of 779796613517 is 715316697977.

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 430059212521 + 349737400996 = 655789^2 + 591386^2 .

It is a cyclic number.

It is not a de Polignac number, because 779796613517 - 2¹² = 779796609421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779796613507) by changing a digit.

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, 69856148 + ... + 69867309.

It is an arithmetic number, because the mean of its divisors is an integer number (194984085639).

Almost surely, 2^779796613517 is an apocalyptic number.

It is an amenable number.

779796613517 is a deficient number, since it is larger than the sum of its proper divisors (139729039).

779796613517 is a wasteful number, since it uses less digits than its factorization.

779796613517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139729038.

The product of its digits is 105019740, while the sum is 68.

The spelling of 779796613517 in words is "seven hundred seventy-nine billion, seven hundred ninety-six million, six hundred thirteen thousand, five hundred seventeen".