15325765961 has 4 divisors (see below), whose sum is σ = 16719017424. Its totient is φ = 13932514500.

The previous prime is 15325765943. The next prime is 15325765991. The reversal of 15325765961 is 16956752351.

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 a de Polignac number, because none of the positive numbers 2^k-15325765961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15325765991) 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, 696625715 + ... + 696625736.

It is an arithmetic number, because the mean of its divisors is an integer number (4179754356).

Almost surely, 2^15325765961 is an apocalyptic number.

15325765961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15325765961 is a deficient number, since it is larger than the sum of its proper divisors (1393251463).

15325765961 is a wasteful number, since it uses less digits than its factorization.

15325765961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393251462.

The product of its digits is 1701000, while the sum is 50.

The spelling of 15325765961 in words is "fifteen billion, three hundred twenty-five million, seven hundred sixty-five thousand, nine hundred sixty-one".