13520536613 has 4 divisors (see below), whose sum is σ = 13535249760. Its totient is φ = 13505823468.

The previous prime is 13520536567. The next prime is 13520536619. The reversal of 13520536613 is 31663502531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31663502531 = 113 ⋅280207987.

It is a cyclic number.

It is not a de Polignac number, because 13520536613 - 2²² = 13516342309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520536619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7355195 + ... + 7357032.

It is an arithmetic number, because the mean of its divisors is an integer number (3383812440).

Almost surely, 2^13520536613 is an apocalyptic number.

It is an amenable number.

13520536613 is a deficient number, since it is larger than the sum of its proper divisors (14713147).

13520536613 is an equidigital number, since it uses as much as digits as its factorization.

13520536613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14713146.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 13520536613 in words is "thirteen billion, five hundred twenty million, five hundred thirty-six thousand, six hundred thirteen".