8691286491 has 6 divisors (see below), whose sum is σ = 12554080500. Its totient is φ = 5794190988.

The previous prime is 8691286423. The next prime is 8691286501. The reversal of 8691286491 is 1946821968.

8691286491 is a `hidden beast` number, since 8 + 69 + 12 + 86 + 491 = 666.

It is not a de Polignac number, because 8691286491 - 2¹⁰ = 8691285467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8691286691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 482849241 + ... + 482849258.

It is an arithmetic number, because the mean of its divisors is an integer number (2092346750).

Almost surely, 2^8691286491 is an apocalyptic number.

8691286491 is a deficient number, since it is larger than the sum of its proper divisors (3862794009).

8691286491 is a wasteful number, since it uses less digits than its factorization.

8691286491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965698505 (or 965698502 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 8691286491 is about 93227.0695184612. The cubic root of 8691286491 is about 2056.0232522812.

The spelling of 8691286491 in words is "eight billion, six hundred ninety-one million, two hundred eighty-six thousand, four hundred ninety-one".