91818853228032 has 320 divisors, whose sum is σ = 294296914982400. Its totient is φ = 24850871746560.

The previous prime is 91818853228027. The next prime is 91818853228033. The reversal of 91818853228032 is 23082235881819.

It is a super-2 number, since 2×91818853228032² (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 (91818853228033) 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, 4005871932 + ... + 4005894852.

It is an arithmetic number, because the mean of its divisors is an integer number (919677859320).

Almost surely, 2^{91818853228032} 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 91818853228032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147148457491200).

91818853228032 is an abundant number, since it is smaller than the sum of its proper divisors (202478061754368).

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

91818853228032 is a wasteful number, since it uses less digits than its factorization.

91818853228032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42577 (or 42561 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 91818853228032 in words is "ninety-one trillion, eight hundred eighteen billion, eight hundred fifty-three million, two hundred twenty-eight thousand, thirty-two".