91236618916 has 9 divisors (see below), whose sum is σ = 159665140299. Its totient is φ = 45618007404.

The previous prime is 91236618911. The next prime is 91236618919. The reversal of 91236618916 is 61981663219.

The square root of 91236618916 is 302054.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91236618911) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 528595 + ... + 679621.

Almost surely, 2^91236618916 is an apocalyptic number.

91236618916 is the 302054-th square number.

It is an amenable number.

91236618916 is a deficient number, since it is larger than the sum of its proper divisors (68428521383).

91236618916 is an frugal number, since it uses more digits than its factorization.

91236618916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302058 (or 151029 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The spelling of 91236618916 in words is "ninety-one billion, two hundred thirty-six million, six hundred eighteen thousand, nine hundred sixteen".