8257385618 has 32 divisors (see below), whose sum is σ = 13443674112. Its totient is φ = 3792531600.

The previous prime is 8257385581. The next prime is 8257385621. The reversal of 8257385618 is 8165837528.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8257385618.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 164705 + ... + 208907.

It is an arithmetic number, because the mean of its divisors is an integer number (420114816).

Almost surely, 2^8257385618 is an apocalyptic number.

8257385618 is a deficient number, since it is larger than the sum of its proper divisors (5186288494).

8257385618 is a wasteful number, since it uses less digits than its factorization.

8257385618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44390.

The product of its digits is 3225600, while the sum is 53.

The square root of 8257385618 is about 90870.1580168099. The cubic root of 8257385618 is about 2021.2228012776. Note that the first 3 decimals are identical.

The spelling of 8257385618 in words is "eight billion, two hundred fifty-seven million, three hundred eighty-five thousand, six hundred eighteen".