8461808691 has 16 divisors (see below), whose sum is σ = 12913365504. Its totient is φ = 4828126464.

The previous prime is 8461808683. The next prime is 8461808713. The reversal of 8461808691 is 1968081648.

It is not a de Polignac number, because 8461808691 - 2³ = 8461808683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8461808791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285231 + ... + 313496.

It is an arithmetic number, because the mean of its divisors is an integer number (807085344).

Almost surely, 2^8461808691 is an apocalyptic number.

8461808691 is a deficient number, since it is larger than the sum of its proper divisors (4451556813).

8461808691 is a wasteful number, since it uses less digits than its factorization.

8461808691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599410.

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 8461808691 is about 91988.0899410353. The cubic root of 8461808691 is about 2037.7664175745.

The spelling of 8461808691 in words is "eight billion, four hundred sixty-one million, eight hundred eight thousand, six hundred ninety-one".