91224017216992 has 96 divisors (see below), whose sum is σ = 198931152680064. Its totient is φ = 40829607667200.

The previous prime is 91224017216963. The next prime is 91224017216999. The reversal of 91224017216992 is 29961271042219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91224017216999) 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, 56058858 + ... + 57663190.

It is an arithmetic number, because the mean of its divisors is an integer number (2072199507084).

Almost surely, 2^{91224017216992} 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 91224017216992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99465576340032).

91224017216992 is an abundant number, since it is smaller than the sum of its proper divisors (107707135463072).

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

91224017216992 is a wasteful number, since it uses less digits than its factorization.

91224017216992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606832 (or 1606824 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 91224017216992 in words is "ninety-one trillion, two hundred twenty-four billion, seventeen million, two hundred sixteen thousand, nine hundred ninety-two".