8491204081 has 12 divisors (see below), whose sum is σ = 9023461888. Its totient is φ = 7988715072.

The previous prime is 8491204039. The next prime is 8491204093. The reversal of 8491204081 is 1804021948.

It is not a de Polignac number, because 8491204081 - 2²⁵ = 8457649649 is a prime.

It is a super-2 number, since 2×8491204081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8491204081.

It is not an unprimeable number, because it can be changed into a prime (8491204021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1281880 + ... + 1288486.

Almost surely, 2^8491204081 is an apocalyptic number.

It is an amenable number.

8491204081 is a deficient number, since it is larger than the sum of its proper divisors (532257807).

8491204081 is a wasteful number, since it uses less digits than its factorization.

8491204081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11088 (or 11071 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 8491204081 is about 92147.7296573280. The cubic root of 8491204081 is about 2040.1233490230.

The spelling of 8491204081 in words is "eight billion, four hundred ninety-one million, two hundred four thousand, eighty-one".