819642618 has 16 divisors (see below), whose sum is σ = 1821428160. Its totient is φ = 273214188.

The previous prime is 819642601. The next prime is 819642619. The reversal of 819642618 is 816246918.

819642618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (819642619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7589230 + ... + 7589337.

It is an arithmetic number, because the mean of its divisors is an integer number (113839260).

Almost surely, 2^819642618 is an apocalyptic number.

819642618 is an abundant number, since it is smaller than the sum of its proper divisors (1001785542).

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

819642618 is a wasteful number, since it uses less digits than its factorization.

819642618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15178578 (or 15178572 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 819642618 is about 28629.4012860905. The cubic root of 819642618 is about 935.8541644913.

The spelling of 819642618 in words is "eight hundred nineteen million, six hundred forty-two thousand, six hundred eighteen".