13520325985 has 16 divisors (see below), whose sum is σ = 16455464064. Its totient is φ = 10662371712.

The previous prime is 13520325967. The next prime is 13520325989. The reversal of 13520325985 is 58952302531.

It is a cyclic number.

It is not a de Polignac number, because 13520325985 - 2¹³ = 13520317793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520325989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751404 + ... + 769186.

It is an arithmetic number, because the mean of its divisors is an integer number (1028466504).

Almost surely, 2^13520325985 is an apocalyptic number.

It is an amenable number.

13520325985 is a deficient number, since it is larger than the sum of its proper divisors (2935138079).

13520325985 is a wasteful number, since it uses less digits than its factorization.

13520325985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19944.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 13520325985 in words is "thirteen billion, five hundred twenty million, three hundred twenty-five thousand, nine hundred eighty-five".