8491502811 has 16 divisors (see below), whose sum is σ = 12355620480. Its totient is φ = 5144555520.

The previous prime is 8491502807. The next prime is 8491502827. The reversal of 8491502811 is 1182051948.

It is not a de Polignac number, because 8491502811 - 2² = 8491502807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8491502811.

It is not an unprimeable number, because it can be changed into a prime (8491502881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53211 + ... + 140763.

It is an arithmetic number, because the mean of its divisors is an integer number (772226280).

Almost surely, 2^8491502811 is an apocalyptic number.

8491502811 is a deficient number, since it is larger than the sum of its proper divisors (3864117669).

8491502811 is a wasteful number, since it uses less digits than its factorization.

8491502811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90506.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 8491502811 is about 92149.3505728608. The cubic root of 8491502811 is about 2040.1472733450.

The spelling of 8491502811 in words is "eight billion, four hundred ninety-one million, five hundred two thousand, eight hundred eleven".