91147324752 has 120 divisors (see below), whose sum is σ = 279385430688. Its totient is φ = 27510240000.

The previous prime is 91147324669. The next prime is 91147324787. The reversal of 91147324752 is 25742374119.

91147324752 is a `hidden beast` number, since 9 + 1 + 147 + 32 + 475 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 91147324698 and 91147324707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282958 + ... + 512210.

Almost surely, 2^91147324752 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 91147324752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139692715344).

91147324752 is an abundant number, since it is smaller than the sum of its proper divisors (188238105936).

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

91147324752 is a wasteful number, since it uses less digits than its factorization.

91147324752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229529 (or 229520 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 91147324752 in words is "ninety-one billion, one hundred forty-seven million, three hundred twenty-four thousand, seven hundred fifty-two".