91823273216 has 18 divisors (see below), whose sum is σ = 183287862282. Its totient is φ = 45911636480.

The previous prime is 91823273209. The next prime is 91823273231. The reversal of 91823273216 is 61237232819.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77230633216 + 14592640000 = 277904^2 + 120800^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 179342075 + ... + 179342586.

Almost surely, 2^91823273216 is an apocalyptic number.

It is an amenable number.

91823273216 is a deficient number, since it is larger than the sum of its proper divisors (91464589066).

91823273216 is an equidigital number, since it uses as much as digits as its factorization.

91823273216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358684677 (or 358684663 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The spelling of 91823273216 in words is "ninety-one billion, eight hundred twenty-three million, two hundred seventy-three thousand, two hundred sixteen".