91229773830 has 256 divisors, whose sum is σ = 252835430400. Its totient is φ = 20896081920.

The previous prime is 91229773829. The next prime is 91229773841. The reversal of 91229773830 is 3837792219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 128673516 + ... + 128674224.

It is an arithmetic number, because the mean of its divisors is an integer number (987638400).

Almost surely, 2^91229773830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91229773830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126417715200).

91229773830 is an abundant number, since it is smaller than the sum of its proper divisors (161605656570).

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

91229773830 is a wasteful number, since it uses less digits than its factorization.

91229773830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 91229773830 in words is "ninety-one billion, two hundred twenty-nine million, seven hundred seventy-three thousand, eight hundred thirty".