12633740165 has 4 divisors (see below), whose sum is σ = 15160488204. Its totient is φ = 10106992128.

The previous prime is 12633740149. The next prime is 12633740191. The reversal of 12633740165 is 56104733621.

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 7659400324 + 4974339841 = 87518^2 + 70529^2 .

It is a cyclic number.

It is not a de Polignac number, because 12633740165 - 2⁴ = 12633740149 is a prime.

It is a super-2 number, since 2×12633740165² (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, 1263374012 + ... + 1263374021.

It is an arithmetic number, because the mean of its divisors is an integer number (3790122051).

Almost surely, 2^12633740165 is an apocalyptic number.

It is an amenable number.

12633740165 is a deficient number, since it is larger than the sum of its proper divisors (2526748039).

12633740165 is an equidigital number, since it uses as much as digits as its factorization.

12633740165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526748038.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 12633740165 in words is "twelve billion, six hundred thirty-three million, seven hundred forty thousand, one hundred sixty-five".