13644562666441 has 4 divisors (see below), whose sum is σ = 15593785904512. Its totient is φ = 11695339428372.

The previous prime is 13644562666379. The next prime is 13644562666447. The reversal of 13644562666441 is 14466626544631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13644562666441 - 2¹¹ = 13644562664393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13644562666447) 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, 974611619025 + ... + 974611619038.

It is an arithmetic number, because the mean of its divisors is an integer number (3898446476128).

Almost surely, 2^{13644562666441} is an apocalyptic number.

It is an amenable number.

13644562666441 is a deficient number, since it is larger than the sum of its proper divisors (1949223238071).

13644562666441 is an equidigital number, since it uses as much as digits as its factorization.

13644562666441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949223238070.

The product of its digits is 59719680, while the sum is 58.

The spelling of 13644562666441 in words is "thirteen trillion, six hundred forty-four billion, five hundred sixty-two million, six hundred sixty-six thousand, four hundred forty-one".