91471027648 has 224 divisors, whose sum is σ = 247060638720. Its totient is φ = 32444375040.

The previous prime is 91471027597. The next prime is 91471027709. The reversal of 91471027648 is 84672017419.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4666893 + ... + 4686451.

It is an arithmetic number, because the mean of its divisors is an integer number (1102949280).

Almost surely, 2^91471027648 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 91471027648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123530319360).

91471027648 is an abundant number, since it is smaller than the sum of its proper divisors (155589611072).

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

91471027648 is a wasteful number, since it uses less digits than its factorization.

91471027648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19675 (or 19665 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 91471027648 in words is "ninety-one billion, four hundred seventy-one million, twenty-seven thousand, six hundred forty-eight".