91216548716928 has 256 divisors, whose sum is σ = 259516796313600. Its totient is φ = 28323376818176.

The previous prime is 91216548716927. The next prime is 91216548716999. The reversal of 91216548716928 is 82961784561219.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91216548716927) 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, 54938425 + ... + 56574407.

It is an arithmetic number, because the mean of its divisors is an integer number (1013737485600).

Almost surely, 2^{91216548716928} 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 91216548716928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129758398156800).

91216548716928 is an abundant number, since it is smaller than the sum of its proper divisors (168300247596672).

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

91216548716928 is a wasteful number, since it uses less digits than its factorization.

91216548716928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636189 (or 1636177 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 69.

The spelling of 91216548716928 in words is "ninety-one trillion, two hundred sixteen billion, five hundred forty-eight million, seven hundred sixteen thousand, nine hundred twenty-eight".