91256675328 has 1408 divisors, whose sum is σ = 369756979200. Its totient is φ = 21546860544.

The previous prime is 91256675311. The next prime is 91256675333. The reversal of 91256675328 is 82357665219.

91256675328 is a `hidden beast` number, since 9 + 1 + 2 + 566 + 7 + 53 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (5443200) is a multiple of the sum of its prime divisors (150).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1099477975 + ... + 1099478057.

Almost surely, 2^91256675328 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 91256675328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184878489600).

91256675328 is an abundant number, since it is smaller than the sum of its proper divisors (278500303872).

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

91256675328 is a wasteful number, since it uses less digits than its factorization.

91256675328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 150 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 91256675328 in words is "ninety-one billion, two hundred fifty-six million, six hundred seventy-five thousand, three hundred twenty-eight".