13728191455091 has 4 divisors (see below), whose sum is σ = 13797177342000. Its totient is φ = 13659205568184.

The previous prime is 13728191455079. The next prime is 13728191455129. The reversal of 13728191455091 is 19055419182731.

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 13728191455091 - 2²² = 13728187260787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13728191455021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34492943156 + ... + 34492943553.

It is an arithmetic number, because the mean of its divisors is an integer number (3449294335500).

Almost surely, 2^{13728191455091} is an apocalyptic number.

13728191455091 is a deficient number, since it is larger than the sum of its proper divisors (68985886909).

13728191455091 is an equidigital number, since it uses as much as digits as its factorization.

13728191455091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68985886908.

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 13728191455091 in words is "thirteen trillion, seven hundred twenty-eight billion, one hundred ninety-one million, four hundred fifty-five thousand, ninety-one".