618471618 has 8 divisors (see below), whose sum is σ = 1236943248. Its totient is φ = 206157204.

The previous prime is 618471583. The next prime is 618471643. The reversal of 618471618 is 816174816.

It is a sphenic number, since it is the product of 3 distinct primes.

618471618 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 618471618.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51539296 + ... + 51539307.

It is an arithmetic number, because the mean of its divisors is an integer number (154617906).

Almost surely, 2^618471618 is an apocalyptic number.

618471618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

618471618 is a wasteful number, since it uses less digits than its factorization.

618471618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103078608.

The product of its digits is 64512, while the sum is 42.

The square root of 618471618 is about 24869.0896093926. The cubic root of 618471618 is about 852.0006474680. Note that the first 3 decimals are identical.

The spelling of 618471618 in words is "six hundred eighteen million, four hundred seventy-one thousand, six hundred eighteen".