13500634523 has 4 divisors (see below), whose sum is σ = 13501415688. Its totient is φ = 13499853360.

The previous prime is 13500634519. The next prime is 13500634561. The reversal of 13500634523 is 32543600531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13500634523 - 2² = 13500634519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13500634523.

It is not an unprimeable number, because it can be changed into a prime (13500634573) 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, 364058 + ... + 399423.

It is an arithmetic number, because the mean of its divisors is an integer number (3375353922).

Almost surely, 2^13500634523 is an apocalyptic number.

13500634523 is a deficient number, since it is larger than the sum of its proper divisors (781165).

13500634523 is an equidigital number, since it uses as much as digits as its factorization.

13500634523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781164.

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 13500634523 in words is "thirteen billion, five hundred million, six hundred thirty-four thousand, five hundred twenty-three".