13520165640 has 64 divisors (see below), whose sum is σ = 40576455360. Its totient is φ = 3603959040.

The previous prime is 13520165621. The next prime is 13520165641. The reversal of 13520165640 is 4656102531.

13520165640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13520165641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304030 + ... + 345650.

It is an arithmetic number, because the mean of its divisors is an integer number (634007115).

Almost surely, 2^13520165640 is an apocalyptic number.

13520165640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13520165640 is an abundant number, since it is smaller than the sum of its proper divisors (27056289720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13520165640 is a wasteful number, since it uses less digits than its factorization.

13520165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44342 (or 44338 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 13520165640 in words is "thirteen billion, five hundred twenty million, one hundred sixty-five thousand, six hundred forty".