91910911092 has 96 divisors (see below), whose sum is σ = 287944710144. Its totient is φ = 22036579200.

The previous prime is 91910911091. The next prime is 91910911153. The reversal of 91910911092 is 29011901919.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91910911091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3813784 + ... + 3837807.

It is an arithmetic number, because the mean of its divisors is an integer number (2999424064).

Almost surely, 2^91910911092 is an apocalyptic number.

It is an amenable number.

91910911092 is an abundant number, since it is smaller than the sum of its proper divisors (196033799052).

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

91910911092 is a wasteful number, since it uses less digits than its factorization.

91910911092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651629 (or 7651627 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 91910911092 in words is "ninety-one billion, nine hundred ten million, nine hundred eleven thousand, ninety-two".