91834578088 has 64 divisors (see below), whose sum is σ = 195088564800. Its totient is φ = 40158328320.

The previous prime is 91834578083. The next prime is 91834578097. The reversal of 91834578088 is 88087543819.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91834578083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131331 + ... + 448237.

It is an arithmetic number, because the mean of its divisors is an integer number (3048258825).

Almost surely, 2^91834578088 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 91834578088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97544282400).

91834578088 is an abundant number, since it is smaller than the sum of its proper divisors (103253986712).

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

91834578088 is a wasteful number, since it uses less digits than its factorization.

91834578088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317050 (or 317046 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 61.

The spelling of 91834578088 in words is "ninety-one billion, eight hundred thirty-four million, five hundred seventy-eight thousand, eighty-eight".