12699164165 has 4 divisors (see below), whose sum is σ = 15238997004. Its totient is φ = 10159331328.

The previous prime is 12699164147. The next prime is 12699164171. The reversal of 12699164165 is 56146199621.

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 4827748324 + 7871415841 = 69482^2 + 88721^2 .

It is a cyclic number.

It is not a de Polignac number, because 12699164165 - 2¹² = 12699160069 is a prime.

It is a super-2 number, since 2×12699164165² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269916412 + ... + 1269916421.

It is an arithmetic number, because the mean of its divisors is an integer number (3809749251).

Almost surely, 2^12699164165 is an apocalyptic number.

It is an amenable number.

12699164165 is a deficient number, since it is larger than the sum of its proper divisors (2539832839).

12699164165 is an equidigital number, since it uses as much as digits as its factorization.

12699164165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539832838.

The product of its digits is 699840, while the sum is 50.

The spelling of 12699164165 in words is "twelve billion, six hundred ninety-nine million, one hundred sixty-four thousand, one hundred sixty-five".