13225640165 has 4 divisors (see below), whose sum is σ = 15870768204. Its totient is φ = 10580512128.

The previous prime is 13225640101. The next prime is 13225640189. The reversal of 13225640165 is 56104652231.

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 10080561604 + 3145078561 = 100402^2 + 56081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13225640165 - 2⁶ = 13225640101 is a prime.

It is a super-2 number, since 2×13225640165² (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, 1322564012 + ... + 1322564021.

It is an arithmetic number, because the mean of its divisors is an integer number (3967692051).

Almost surely, 2^13225640165 is an apocalyptic number.

It is an amenable number.

13225640165 is a deficient number, since it is larger than the sum of its proper divisors (2645128039).

13225640165 is an equidigital number, since it uses as much as digits as its factorization.

13225640165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645128038.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 13225640165 in words is "thirteen billion, two hundred twenty-five million, six hundred forty thousand, one hundred sixty-five".