13634687693761 has 4 divisors (see below), whose sum is σ = 13646116603332. Its totient is φ = 13623258784192.

The previous prime is 13634687693629. The next prime is 13634687693771. The reversal of 13634687693761 is 16739678643631.

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 5269687536400 + 8365000157361 = 2295580^2 + 2892231^2 .

It is a cyclic number.

It is not a de Polignac number, because 13634687693761 - 2¹³ = 13634687685569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13634687693771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5714452996 + ... + 5714455381.

It is an arithmetic number, because the mean of its divisors is an integer number (3411529150833).

Almost surely, 2^{13634687693761} is an apocalyptic number.

It is an amenable number.

13634687693761 is a deficient number, since it is larger than the sum of its proper divisors (11428909571).

13634687693761 is a wasteful number, since it uses less digits than its factorization.

13634687693761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428909570.

The product of its digits is 493807104, while the sum is 70.

The spelling of 13634687693761 in words is "thirteen trillion, six hundred thirty-four billion, six hundred eighty-seven million, six hundred ninety-three thousand, seven hundred sixty-one".