91135672319 has 4 divisors (see below), whose sum is σ = 91141632960. Its totient is φ = 91129711680.

The previous prime is 91135672247. The next prime is 91135672379. The reversal of 91135672319 is 91327653119.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91135672319 is a prime.

It is a super-2 number, since 2×91135672319² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91135672379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2957327 + ... + 2987984.

It is an arithmetic number, because the mean of its divisors is an integer number (22785408240).

Almost surely, 2^91135672319 is an apocalyptic number.

91135672319 is a deficient number, since it is larger than the sum of its proper divisors (5960641).

91135672319 is a wasteful number, since it uses less digits than its factorization.

91135672319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960640.

The product of its digits is 306180, while the sum is 47.

The spelling of 91135672319 in words is "ninety-one billion, one hundred thirty-five million, six hundred seventy-two thousand, three hundred nineteen".