91129027132 has 24 divisors (see below), whose sum is σ = 187356182832. Its totient is φ = 38235955200.

The previous prime is 91129027127. The next prime is 91129027139. The reversal of 91129027132 is 23172092119.

It is a junction number, because it is equal to n+sod(n) for n = 91129027091 and 91129027100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91129027139) 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, 79657669 + ... + 79658812.

It is an arithmetic number, because the mean of its divisors is an integer number (7806507618).

Almost surely, 2^91129027132 is an apocalyptic number.

It is an amenable number.

91129027132 is an abundant number, since it is smaller than the sum of its proper divisors (96227155700).

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

91129027132 is a wasteful number, since it uses less digits than its factorization.

91129027132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159316509 (or 159316507 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 91129027132 in words is "ninety-one billion, one hundred twenty-nine million, twenty-seven thousand, one hundred thirty-two".