91358325163128 has 128 divisors (see below), whose sum is σ = 235824662177280. Its totient is φ = 29475203788800.

The previous prime is 91358325163121. The next prime is 91358325163181. The reversal of 91358325163128 is 82136152385319.

91358325163128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×91358325163128² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91358325163121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577286700 + ... + 577444932.

It is an arithmetic number, because the mean of its divisors is an integer number (1842380173260).

Almost surely, 2^{91358325163128} 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 91358325163128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117912331088640).

91358325163128 is an abundant number, since it is smaller than the sum of its proper divisors (144466337014152).

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

91358325163128 is a wasteful number, since it uses less digits than its factorization.

91358325163128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163349 (or 163345 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 57.

The spelling of 91358325163128 in words is "ninety-one trillion, three hundred fifty-eight billion, three hundred twenty-five million, one hundred sixty-three thousand, one hundred twenty-eight".