13631645 has 32 divisors (see below), whose sum is σ = 18247680. Its totient is φ = 9737280.

The previous prime is 13631641. The next prime is 13631659. The reversal of 13631645 is 54613631.

It is a happy number.

It is not a de Polignac number, because 13631645 - 2² = 13631641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13631641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191960 + ... + 192030.

It is an arithmetic number, because the mean of its divisors is an integer number (570240).

Almost surely, 2^13631645 is an apocalyptic number.

It is an amenable number.

13631645 is a deficient number, since it is larger than the sum of its proper divisors (4616035).

13631645 is a wasteful number, since it uses less digits than its factorization.

13631645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185.

The product of its digits is 6480, while the sum is 29.

The square root of 13631645 is about 3692.1057677158. The cubic root of 13631645 is about 238.8816311318.

The spelling of 13631645 in words is "thirteen million, six hundred thirty-one thousand, six hundred forty-five".