8681331851 has 2 divisors, whose sum is σ = 8681331852. Its totient is φ = 8681331850.

The previous prime is 8681331847. The next prime is 8681331871. The reversal of 8681331851 is 1581331868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8681331851 - 2² = 8681331847 is a prime.

It is not a weakly prime, because it can be changed into another prime (8681331871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4340665925 + 4340665926.

It is an arithmetic number, because the mean of its divisors is an integer number (4340665926).

Almost surely, 2^8681331851 is an apocalyptic number.

8681331851 is a deficient number, since it is larger than the sum of its proper divisors (1).

8681331851 is an equidigital number, since it uses as much as digits as its factorization.

8681331851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 44.

The square root of 8681331851 is about 93173.6650078766. The cubic root of 8681331851 is about 2055.2379910769.

The spelling of 8681331851 in words is "eight billion, six hundred eighty-one million, three hundred thirty-one thousand, eight hundred fifty-one".