13644801 has 16 divisors (see below), whose sum is σ = 20473600. Its totient is φ = 8979984.

The previous prime is 13644781. The next prime is 13644809. The reversal of 13644801 is 10844631.

13644801 is a `hidden beast` number, since 13 + 644 + 8 + 0 + 1 = 666.

It is not a de Polignac number, because 13644801 - 2⁵ = 13644769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13644809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (1279600).

Almost surely, 2^13644801 is an apocalyptic number.

13644801 is the 2133-rd octagonal number.

It is an amenable number.

13644801 is a deficient number, since it is larger than the sum of its proper divisors (6828799).

13644801 is an equidigital number, since it uses as much as digits as its factorization.

13644801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485 (or 6479 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 13644801 is about 3693.8869771556. The cubic root of 13644801 is about 238.9584552240.

The spelling of 13644801 in words is "thirteen million, six hundred forty-four thousand, eight hundred one".