13509864707 has 4 divisors (see below), whose sum is σ = 13579864200. Its totient is φ = 13439865216.

The previous prime is 13509864679. The next prime is 13509864727. The reversal of 13509864707 is 70746890531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70746890531 = 38449 ⋅1840019.

It is a cyclic number.

It is not a de Polignac number, because 13509864707 - 2¹⁸ = 13509602563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13509864727) 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, 34999457 + ... + 34999842.

It is an arithmetic number, because the mean of its divisors is an integer number (3394966050).

Almost surely, 2^13509864707 is an apocalyptic number.

13509864707 is a deficient number, since it is larger than the sum of its proper divisors (69999493).

13509864707 is an equidigital number, since it uses as much as digits as its factorization.

13509864707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69999492.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 13509864707 in words is "thirteen billion, five hundred nine million, eight hundred sixty-four thousand, seven hundred seven".