13520165625 has 120 divisors (see below), whose sum is σ = 26073831168. Its totient is φ = 6974100000.

The previous prime is 13520165621. The next prime is 13520165641. The reversal of 13520165625 is 52656102531.

13520165625 is a `hidden beast` number, since 1 + 3 + 5 + 20 + 1 + 6 + 5 + 625 = 666.

It is not a de Polignac number, because 13520165625 - 2² = 13520165621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13520165625.

It is not an unprimeable number, because it can be changed into a prime (13520165621) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7846014 + ... + 7847736.

Almost surely, 2^13520165625 is an apocalyptic number.

13520165625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13520165625 is a deficient number, since it is larger than the sum of its proper divisors (12553665543).

13520165625 is an frugal number, since it uses more digits than its factorization.

13520165625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 13520165625 in words is "thirteen billion, five hundred twenty million, one hundred sixty-five thousand, six hundred twenty-five".