91911972640292 has 48 divisors (see below), whose sum is σ = 186121220463360. Its totient is φ = 38900577360000.

The previous prime is 91911972640277. The next prime is 91911972640331. The reversal of 91911972640292 is 29204627911919.

It is a happy number.

91911972640292 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40674584 + ... + 42874767.

It is an arithmetic number, because the mean of its divisors is an integer number (3877525426320).

Almost surely, 2^{91911972640292} is an apocalyptic number.

It is an amenable number.

91911972640292 is an abundant number, since it is smaller than the sum of its proper divisors (94209247823068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91911972640292 is a wasteful number, since it uses less digits than its factorization.

91911972640292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83549852 (or 83549850 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 62.

The spelling of 91911972640292 in words is "ninety-one trillion, nine hundred eleven billion, nine hundred seventy-two million, six hundred forty thousand, two hundred ninety-two".