8491125784 has 16 divisors (see below), whose sum is σ = 15952147200. Its totient is φ = 4237219872.

The previous prime is 8491125761. The next prime is 8491125869. The reversal of 8491125784 is 4875211948.

It is a super-2 number, since 2×8491125784² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038552 + ... + 1046695.

It is an arithmetic number, because the mean of its divisors is an integer number (997009200).

Almost surely, 2^8491125784 is an apocalyptic number.

It is an amenable number.

8491125784 is a deficient number, since it is larger than the sum of its proper divisors (7461021416).

8491125784 is a wasteful number, since it uses less digits than its factorization.

8491125784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085762 (or 2085758 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 8491125784 is about 92147.3048113725. The cubic root of 8491125784 is about 2040.1170783761.

The spelling of 8491125784 in words is "eight billion, four hundred ninety-one million, one hundred twenty-five thousand, seven hundred eighty-four".