13944141565 has 4 divisors (see below), whose sum is σ = 16732969884. Its totient is φ = 11155313248.

The previous prime is 13944141521. The next prime is 13944141577. The reversal of 13944141565 is 56514144931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56514144931 = 15461 ⋅3655271.

It can be written as a sum of positive squares in 2 ways, for example, as 2484224964 + 11459916601 = 49842^2 + 107051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13944141565 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394414152 + ... + 1394414161.

It is an arithmetic number, because the mean of its divisors is an integer number (4183242471).

Almost surely, 2^13944141565 is an apocalyptic number.

It is an amenable number.

13944141565 is a deficient number, since it is larger than the sum of its proper divisors (2788828319).

13944141565 is an equidigital number, since it uses as much as digits as its factorization.

13944141565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788828318.

The product of its digits is 259200, while the sum is 43.

The spelling of 13944141565 in words is "thirteen billion, nine hundred forty-four million, one hundred forty-one thousand, five hundred sixty-five".