779878065013 has 4 divisors (see below), whose sum is σ = 779948215360. Its totient is φ = 779807914668.

The previous prime is 779878065007. The next prime is 779878065037. The reversal of 779878065013 is 310560878977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 779878065013 - 2⁹ = 779878064501 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 (779878065053) 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, 35058495 + ... + 35080732.

It is an arithmetic number, because the mean of its divisors is an integer number (194987053840).

Almost surely, 2^779878065013 is an apocalyptic number.

It is an amenable number.

779878065013 is a deficient number, since it is larger than the sum of its proper divisors (70150347).

779878065013 is a wasteful number, since it uses less digits than its factorization.

779878065013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70150346.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 779878065013 in words is "seven hundred seventy-nine billion, eight hundred seventy-eight million, sixty-five thousand, thirteen".