12779618377813 has 24 divisors (see below), whose sum is σ = 15442582271424. Its totient is φ = 10354079171520.

The previous prime is 12779618377793. The next prime is 12779618377843. The reversal of 12779618377813 is 31877381697721.

It is not a de Polignac number, because 12779618377813 - 2¹³ = 12779618369621 is a prime.

It is a super-2 number, since 2×12779618377813² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779618377843) 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, 21800856 + ... + 22379377.

It is an arithmetic number, because the mean of its divisors is an integer number (643440927976).

Almost surely, 2^{12779618377813} is an apocalyptic number.

It is an amenable number.

12779618377813 is a deficient number, since it is larger than the sum of its proper divisors (2662963893611).

12779618377813 is an equidigital number, since it uses as much as digits as its factorization.

12779618377813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44180345 (or 44180314 counting only the distinct ones).

The product of its digits is 149361408, while the sum is 70.

The spelling of 12779618377813 in words is "twelve trillion, seven hundred seventy-nine billion, six hundred eighteen million, three hundred seventy-seven thousand, eight hundred thirteen".