9091535872 has 88 divisors (see below), whose sum is σ = 19189396800. Its totient is φ = 4293328896.

The previous prime is 9091535813. The next prime is 9091535879. The reversal of 9091535872 is 2785351909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9091535879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9785904 + ... + 9786832.

Almost surely, 2^9091535872 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 9091535872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9594698400).

9091535872 is an abundant number, since it is smaller than the sum of its proper divisors (10097860928).

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

9091535872 is a wasteful number, since it uses less digits than its factorization.

9091535872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1453 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 9091535872 is about 95349.5457356772. The cubic root of 9091535872 is about 2087.1119861707. Note that the first 3 decimals are identical.

The spelling of 9091535872 in words is "nine billion, ninety-one million, five hundred thirty-five thousand, eight hundred seventy-two".