13313557133761 has 4 divisors (see below), whose sum is σ = 14096707553412. Its totient is φ = 12530406714112.

The previous prime is 13313557133641. The next prime is 13313557133803. The reversal of 13313557133761 is 16733175531331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12339546047361 + 974011086400 = 3512769^2 + 986920^2 .

It is a cyclic number.

It is not a de Polignac number, because 13313557133761 - 2²³ = 13313548745153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13313557137761) 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, 391575209800 + ... + 391575209833.

It is an arithmetic number, because the mean of its divisors is an integer number (3524176888353).

Almost surely, 2^{13313557133761} is an apocalyptic number.

It is an amenable number.

13313557133761 is a deficient number, since it is larger than the sum of its proper divisors (783150419651).

13313557133761 is an equidigital number, since it uses as much as digits as its factorization.

13313557133761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783150419650.

The product of its digits is 1786050, while the sum is 49.

The spelling of 13313557133761 in words is "thirteen trillion, three hundred thirteen billion, five hundred fifty-seven million, one hundred thirty-three thousand, seven hundred sixty-one".