91192955020 has 24 divisors (see below), whose sum is σ = 196681023504. Its totient is φ = 35491311936.

The previous prime is 91192955017. The next prime is 91192955023. The reversal of 91192955020 is 2055929119.

It is an interprime number because it is at equal distance from previous prime (91192955017) and next prime (91192955023).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91192955023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61616122 + ... + 61617601.

It is an arithmetic number, because the mean of its divisors is an integer number (8195042646).

Almost surely, 2^91192955020 is an apocalyptic number.

It is an amenable number.

91192955020 is an abundant number, since it is smaller than the sum of its proper divisors (105488068484).

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

91192955020 is a wasteful number, since it uses less digits than its factorization.

91192955020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123233769 (or 123233767 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 43.

The spelling of 91192955020 in words is "ninety-one billion, one hundred ninety-two million, nine hundred fifty-five thousand, twenty".