91159068916 has 6 divisors (see below), whose sum is σ = 159528370610. Its totient is φ = 45579534456.

The previous prime is 91159068899. The next prime is 91159068947. The reversal of 91159068916 is 61986095119.

It can be written as a sum of positive squares in only one way, i.e., 69988818916 + 21170250000 = 264554^2 + 145500^2 .

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, 11394883611 + ... + 11394883618.

Almost surely, 2^91159068916 is an apocalyptic number.

It is an amenable number.

91159068916 is a deficient number, since it is larger than the sum of its proper divisors (68369301694).

91159068916 is a wasteful number, since it uses less digits than its factorization.

91159068916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22789767233 (or 22789767231 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 91159068916 in words is "ninety-one billion, one hundred fifty-nine million, sixty-eight thousand, nine hundred sixteen".