691892613191 has 16 divisors (see below), whose sum is σ = 749845875744. Its totient is φ = 634619351424.

The previous prime is 691892613179. The next prime is 691892613239. The reversal of 691892613191 is 191316298196.

It is a cyclic number.

It is not a de Polignac number, because 691892613191 - 2²⁶ = 691825504327 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 (691892613151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3932885 + ... + 4105041.

It is an arithmetic number, because the mean of its divisors is an integer number (46865367234).

Almost surely, 2^691892613191 is an apocalyptic number.

691892613191 is a deficient number, since it is larger than the sum of its proper divisors (57953262553).

691892613191 is a wasteful number, since it uses less digits than its factorization.

691892613191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174130.

The product of its digits is 1259712, while the sum is 56.

The spelling of 691892613191 in words is "six hundred ninety-one billion, eight hundred ninety-two million, six hundred thirteen thousand, one hundred ninety-one".