91091159672 has 16 divisors (see below), whose sum is σ = 171334717560. Its totient is φ = 45401901664.

The previous prime is 91091159671. The next prime is 91091159701. The reversal of 91091159672 is 27695119019.

It is a self number, because there is not a number n which added to its sum of digits gives 91091159672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91091159671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17957078 + ... + 17962149.

Almost surely, 2^91091159672 is an apocalyptic number.

It is an amenable number.

91091159672 is a deficient number, since it is larger than the sum of its proper divisors (80243557888).

91091159672 is a wasteful number, since it uses less digits than its factorization.

91091159672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35919550 (or 35919546 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 50.

The spelling of 91091159672 in words is "ninety-one billion, ninety-one million, one hundred fifty-nine thousand, six hundred seventy-two".