91229691432 has 384 divisors, whose sum is σ = 270732672000. Its totient is φ = 25546752000.

The previous prime is 91229691419. The next prime is 91229691437. The reversal of 91229691432 is 23419692219.

It is not an unprimeable number, because it can be changed into a prime (91229691437) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 203183944 + ... + 203184392.

It is an arithmetic number, because the mean of its divisors is an integer number (705033000).

Almost surely, 2^91229691432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91229691432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135366336000).

91229691432 is an abundant number, since it is smaller than the sum of its proper divisors (179502980568).

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

91229691432 is a wasteful number, since it uses less digits than its factorization.

91229691432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 594 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The spelling of 91229691432 in words is "ninety-one billion, two hundred twenty-nine million, six hundred ninety-one thousand, four hundred thirty-two".