91118424928 has 48 divisors (see below), whose sum is σ = 183861797616. Its totient is φ = 44424540160.

The previous prime is 91118424893. The next prime is 91118424941. The reversal of 91118424928 is 82942481119.

It is a super-2 number, since 2×91118424928² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2610600 + ... + 2645272.

It is an arithmetic number, because the mean of its divisors is an integer number (3830454117).

Almost surely, 2^91118424928 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 91118424928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91930898808).

91118424928 is an abundant number, since it is smaller than the sum of its proper divisors (92743372688).

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

91118424928 is a wasteful number, since it uses less digits than its factorization.

91118424928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36727 (or 36719 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The spelling of 91118424928 in words is "ninety-one billion, one hundred eighteen million, four hundred twenty-four thousand, nine hundred twenty-eight".