13161444665 has 8 divisors (see below), whose sum is σ = 15868586688. Its totient is φ = 10479253680.

The previous prime is 13161444631. The next prime is 13161444697. The reversal of 13161444665 is 56644416131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13161444665 - 2⁸ = 13161444409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6236597 + ... + 6238706.

It is an arithmetic number, because the mean of its divisors is an integer number (1983573336).

Almost surely, 2^13161444665 is an apocalyptic number.

It is an amenable number.

13161444665 is a deficient number, since it is larger than the sum of its proper divisors (2707142023).

13161444665 is a wasteful number, since it uses less digits than its factorization.

13161444665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12475519.

The product of its digits is 207360, while the sum is 41.

The spelling of 13161444665 in words is "thirteen billion, one hundred sixty-one million, four hundred forty-four thousand, six hundred sixty-five".