13165925779 has 4 divisors (see below), whose sum is σ = 13166201776. Its totient is φ = 13165649784.

The previous prime is 13165925749. The next prime is 13165925827. The reversal of 13165925779 is 97752956131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97752956131 = 4001 ⋅24432131.

It is a cyclic number.

It is not a de Polignac number, because 13165925779 - 2²³ = 13157537171 is a prime.

It is a deceptive number, since it divides R_13165925778.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13165925749) 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, 45999 + ... + 168664.

It is an arithmetic number, because the mean of its divisors is an integer number (3291550444).

Almost surely, 2^13165925779 is an apocalyptic number.

13165925779 is the 61333-rd nonagonal number.

13165925779 is a deficient number, since it is larger than the sum of its proper divisors (275997).

13165925779 is an equidigital number, since it uses as much as digits as its factorization.

13165925779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275996.

The product of its digits is 3572100, while the sum is 55.

The spelling of 13165925779 in words is "thirteen billion, one hundred sixty-five million, nine hundred twenty-five thousand, seven hundred seventy-nine".