13645636 has 9 divisors (see below), whose sum is σ = 23892799. Its totient is φ = 6819124.

The previous prime is 13645633. The next prime is 13645691. The reversal of 13645636 is 63654631.

The square root of 13645636 is 3694.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13645633) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6465 + ... + 8311.

Almost surely, 2^13645636 is an apocalyptic number.

13645636 is the 3694-th square number.

It is an amenable number.

13645636 is a deficient number, since it is larger than the sum of its proper divisors (10247163).

13645636 is an frugal number, since it uses more digits than its factorization.

13645636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698 (or 1849 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The cubic root of 13645636 is about 238.9633295162.

The spelling of 13645636 in words is "thirteen million, six hundred forty-five thousand, six hundred thirty-six".