191413127691 has 24 divisors (see below), whose sum is σ = 291416233680. Its totient is φ = 120883753536.

The previous prime is 191413127687. The next prime is 191413127701. The reversal of 191413127691 is 196721314191.

It is not a de Polignac number, because 191413127691 - 2² = 191413127687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191413127621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6904881 + ... + 6932546.

It is an arithmetic number, because the mean of its divisors is an integer number (12142343070).

Almost surely, 2^191413127691 is an apocalyptic number.

191413127691 is a deficient number, since it is larger than the sum of its proper divisors (100003105989).

191413127691 is a wasteful number, since it uses less digits than its factorization.

191413127691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13837515 (or 13837512 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The spelling of 191413127691 in words is "one hundred ninety-one billion, four hundred thirteen million, one hundred twenty-seven thousand, six hundred ninety-one".