13231887618833 has 16 divisors (see below), whose sum is σ = 14598786739152. Its totient is φ = 11914915968000.

The previous prime is 13231887618757. The next prime is 13231887618869. The reversal of 13231887618833 is 33881678813231.

It can be written as a sum of positive squares in 8 ways, for example, as 2956862519809 + 10275025099024 = 1719553^2 + 3205468^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231887618833 - 2²⁴ = 13231870841617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231887618883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3904403 + ... + 6458183.

It is an arithmetic number, because the mean of its divisors is an integer number (912424171197).

Almost surely, 2^{13231887618833} is an apocalyptic number.

13231887618833 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13231887618833 is a deficient number, since it is larger than the sum of its proper divisors (1366899120319).

13231887618833 is a wasteful number, since it uses less digits than its factorization.

13231887618833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563556.

The product of its digits is 27869184, while the sum is 62.

The spelling of 13231887618833 in words is "thirteen trillion, two hundred thirty-one billion, eight hundred eighty-seven million, six hundred eighteen thousand, eight hundred thirty-three".