13239141561 has 24 divisors (see below), whose sum is σ = 20678920704. Its totient is φ = 8130165120.

The previous prime is 13239141541. The next prime is 13239141571. The reversal of 13239141561 is 16514193231.

13239141561 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 91 + 4 + 1 + 561 = 666.

It is not a de Polignac number, because 13239141561 - 2⁵ = 13239141529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13239141541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 913345 + ... + 927726.

It is an arithmetic number, because the mean of its divisors is an integer number (861621696).

Almost surely, 2^13239141561 is an apocalyptic number.

It is an amenable number.

13239141561 is a deficient number, since it is larger than the sum of its proper divisors (7439779143).

13239141561 is a wasteful number, since it uses less digits than its factorization.

13239141561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841141 (or 1841138 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 13239141561 in words is "thirteen billion, two hundred thirty-nine million, one hundred forty-one thousand, five hundred sixty-one".