8165555618 has 16 divisors (see below), whose sum is σ = 13368136320. Its totient is φ = 3709861200.

The previous prime is 8165555597. The next prime is 8165555621.

It is a happy number.

8165555618 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×8165555618³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39578 + ... + 133781.

It is an arithmetic number, because the mean of its divisors is an integer number (835508520).

Almost surely, 2^8165555618 is an apocalyptic number.

8165555618 is a deficient number, since it is larger than the sum of its proper divisors (5202580702).

8165555618 is a wasteful number, since it uses less digits than its factorization.

8165555618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175513.

The product of its digits is 1440000, while the sum is 50.

The square root of 8165555618 is about 90363.4639552956. The cubic root of 8165555618 is about 2013.7022118125.

The spelling of 8165555618 in words is "eight billion, one hundred sixty-five million, five hundred fifty-five thousand, six hundred eighteen".