13644544605 has 16 divisors (see below), whose sum is σ = 21834633024. Its totient is φ = 7275969920.

The previous prime is 13644544603. The next prime is 13644544619. The reversal of 13644544605 is 50644544631.

It is not a de Polignac number, because 13644544605 - 2¹ = 13644544603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13644544603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35785 + ... + 169025.

It is an arithmetic number, because the mean of its divisors is an integer number (1364664564).

Almost surely, 2^13644544605 is an apocalyptic number.

13644544605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13644544605 is a deficient number, since it is larger than the sum of its proper divisors (8190088419).

13644544605 is a wasteful number, since it uses less digits than its factorization.

13644544605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140076.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 13644544605 in words is "thirteen billion, six hundred forty-four million, five hundred forty-four thousand, six hundred five".