1849611618 has 16 divisors (see below), whose sum is σ = 4110248160. Its totient is φ = 616537188.

The previous prime is 1849611583. The next prime is 1849611623. The reversal of 1849611618 is 8161169481.

It is a happy number.

1849611618 is a `hidden beast` number, since 18 + 4 + 9 + 6 + 11 + 618 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17125980 + ... + 17126087.

It is an arithmetic number, because the mean of its divisors is an integer number (256890510).

Almost surely, 2^1849611618 is an apocalyptic number.

1849611618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1849611618 is an abundant number, since it is smaller than the sum of its proper divisors (2260636542).

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

1849611618 is a wasteful number, since it uses less digits than its factorization.

1849611618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34252078 (or 34252072 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1849611618 is about 43007.1112491876. Note that the first 3 decimals coincide. The cubic root of 1849611618 is about 1227.5151142084.

The spelling of 1849611618 in words is "one billion, eight hundred forty-nine million, six hundred eleven thousand, six hundred eighteen".