14965391561 has 4 divisors (see below), whose sum is σ = 14972880000. Its totient is φ = 14957903124.

The previous prime is 14965391557. The next prime is 14965391579. The reversal of 14965391561 is 16519356941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16519356941 = 19 ⋅869439839.

It is a cyclic number.

It is not a de Polignac number, because 14965391561 - 2² = 14965391557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14965391521) 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, 3741221 + ... + 3745218.

It is an arithmetic number, because the mean of its divisors is an integer number (3743220000).

Almost surely, 2^14965391561 is an apocalyptic number.

It is an amenable number.

14965391561 is a deficient number, since it is larger than the sum of its proper divisors (7488439).

14965391561 is an equidigital number, since it uses as much as digits as its factorization.

14965391561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488438.

The product of its digits is 874800, while the sum is 50.

The spelling of 14965391561 in words is "fourteen billion, nine hundred sixty-five million, three hundred ninety-one thousand, five hundred sixty-one".