91722319492 has 6 divisors (see below), whose sum is σ = 160514059118. Its totient is φ = 45861159744.

The previous prime is 91722319483. The next prime is 91722319523. The reversal of 91722319492 is 29491322719.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 91218496576 + 503822916 = 302024^2 + 22446^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11465289933 + ... + 11465289940.

Almost surely, 2^91722319492 is an apocalyptic number.

It is an amenable number.

91722319492 is a deficient number, since it is larger than the sum of its proper divisors (68791739626).

91722319492 is a wasteful number, since it uses less digits than its factorization.

91722319492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22930579877 (or 22930579875 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The spelling of 91722319492 in words is "ninety-one billion, seven hundred twenty-two million, three hundred nineteen thousand, four hundred ninety-two".