91286748984 has 192 divisors, whose sum is σ = 248194800000. Its totient is φ = 27901158912.

The previous prime is 91286748929. The next prime is 91286749007. The reversal of 91286748984 is 48984768219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217867927 + ... + 217868345.

It is an arithmetic number, because the mean of its divisors is an integer number (1292681250).

Almost surely, 2^91286748984 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 91286748984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124097400000).

91286748984 is an abundant number, since it is smaller than the sum of its proper divisors (156908051016).

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

91286748984 is a wasteful number, since it uses less digits than its factorization.

91286748984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 829 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 66.

The spelling of 91286748984 in words is "ninety-one billion, two hundred eighty-six million, seven hundred forty-eight thousand, nine hundred eighty-four".