8091331618 has 8 divisors (see below), whose sum is σ = 12137571612. Its totient is φ = 4045474416.

The previous prime is 8091331571. The next prime is 8091331639. The reversal of 8091331618 is 8161331908.

It can be written as a sum of positive squares in 2 ways, for example, as 8061705369 + 29626249 = 89787^2 + 5443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35205 + ... + 131992.

Almost surely, 2^8091331618 is an apocalyptic number.

8091331618 is a deficient number, since it is larger than the sum of its proper divisors (4046239994).

8091331618 is a wasteful number, since it uses less digits than its factorization.

8091331618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191396.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 8091331618 is about 89951.8294310905. The cubic root of 8091331618 is about 2007.5821870616.

The spelling of 8091331618 in words is "eight billion, ninety-one million, three hundred thirty-one thousand, six hundred eighteen".