13621125265 has 32 divisors (see below), whose sum is σ = 18267080832. Its totient is φ = 9664704000.

The previous prime is 13621125263. The next prime is 13621125281. The reversal of 13621125265 is 56252112631.

It is not a de Polignac number, because 13621125265 - 2¹ = 13621125263 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 13621125265.

It is not an unprimeable number, because it can be changed into a prime (13621125263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2411845 + ... + 2417485.

It is an arithmetic number, because the mean of its divisors is an integer number (570846276).

Almost surely, 2^13621125265 is an apocalyptic number.

It is an amenable number.

13621125265 is a deficient number, since it is larger than the sum of its proper divisors (4645955567).

13621125265 is a wasteful number, since it uses less digits than its factorization.

13621125265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721.

The product of its digits is 21600, while the sum is 34.

Adding to 13621125265 its reverse (56252112631), we get a palindrome (69873237896).

The spelling of 13621125265 in words is "thirteen billion, six hundred twenty-one million, one hundred twenty-five thousand, two hundred sixty-five".