8440173018 has 12 divisors (see below), whose sum is σ = 18287041578. Its totient is φ = 2813391000.

The previous prime is 8440173011. The next prime is 8440173101. The reversal of 8440173018 is 8103710448.

It can be written as a sum of positive squares in only one way, i.e., 8025113889 + 415059129 = 89583^2 + 20373^2 .

It is not an unprimeable number, because it can be changed into a prime (8440173011) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 234449233 + ... + 234449268.

Almost surely, 2^8440173018 is an apocalyptic number.

8440173018 is an abundant number, since it is smaller than the sum of its proper divisors (9846868560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8440173018 is a wasteful number, since it uses less digits than its factorization.

8440173018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468898509 (or 468898506 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 8440173018 is about 91870.4142692303. The cubic root of 8440173018 is about 2036.0281730707.

The spelling of 8440173018 in words is "eight billion, four hundred forty million, one hundred seventy-three thousand, eighteen".