1636731351413 has 4 divisors (see below), whose sum is σ = 1733009666220. Its totient is φ = 1540453036608.

The previous prime is 1636731351397. The next prime is 1636731351421. The reversal of 1636731351413 is 3141531376361.

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 635084674084 + 1001646677329 = 796922^2 + 1000823^2 .

It is a cyclic number.

It is not a de Polignac number, because 1636731351413 - 2⁴ = 1636731351397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636731351113) 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, 48139157378 + ... + 48139157411.

It is an arithmetic number, because the mean of its divisors is an integer number (433252416555).

Almost surely, 2^{1636731351413} is an apocalyptic number.

It is an amenable number.

1636731351413 is a deficient number, since it is larger than the sum of its proper divisors (96278314807).

1636731351413 is an equidigital number, since it uses as much as digits as its factorization.

1636731351413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96278314806.

The product of its digits is 408240, while the sum is 44.

The spelling of 1636731351413 in words is "one trillion, six hundred thirty-six billion, seven hundred thirty-one million, three hundred fifty-one thousand, four hundred thirteen".