13685202790991 has 4 divisors (see below), whose sum is σ = 13743937567152. Its totient is φ = 13626468014832.

The previous prime is 13685202790981. The next prime is 13685202791017. The reversal of 13685202790991 is 19909720258631.

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

It is a cyclic number.

It is not a de Polignac number, because 13685202790991 - 2⁶ = 13685202790927 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 (13685202790921) 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, 29367387731 + ... + 29367388196.

It is an arithmetic number, because the mean of its divisors is an integer number (3435984391788).

Almost surely, 2^{13685202790991} is an apocalyptic number.

13685202790991 is a deficient number, since it is larger than the sum of its proper divisors (58734776161).

13685202790991 is an equidigital number, since it uses as much as digits as its factorization.

13685202790991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58734776160.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 13685202790991 in words is "thirteen trillion, six hundred eighty-five billion, two hundred two million, seven hundred ninety thousand, nine hundred ninety-one".