8151663391 has 2 divisors, whose sum is σ = 8151663392. Its totient is φ = 8151663390.

The previous prime is 8151663361. The next prime is 8151663449. The reversal of 8151663391 is 1933661518.

It is a happy number.

8151663391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8151663391 - 2²⁵ = 8118108959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8151663301) 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 as a sum of consecutive naturals, namely, 4075831695 + 4075831696.

It is an arithmetic number, because the mean of its divisors is an integer number (4075831696).

Almost surely, 2^8151663391 is an apocalyptic number.

8151663391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151663391 is an equidigital number, since it uses as much as digits as its factorization.

8151663391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 8151663391 is about 90286.5626270045. The cubic root of 8151663391 is about 2012.5595793017.

The spelling of 8151663391 in words is "eight billion, one hundred fifty-one million, six hundred sixty-three thousand, three hundred ninety-one".