1718386668 has 36 divisors (see below), whose sum is σ = 4483821888. Its totient is φ = 554317920.

The previous prime is 1718386667. The next prime is 1718386679. The reversal of 1718386668 is 8666838171.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1718386667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768771 + ... + 771002.

It is an arithmetic number, because the mean of its divisors is an integer number (124550608).

Almost surely, 2^1718386668 is an apocalyptic number.

1718386668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1718386668 is an abundant number, since it is smaller than the sum of its proper divisors (2765435220).

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

1718386668 is a wasteful number, since it uses less digits than its factorization.

1718386668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539814 (or 1539809 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1718386668 is about 41453.4276990456. The cubic root of 1718386668 is about 1197.7705522005.

The spelling of 1718386668 in words is "one billion, seven hundred eighteen million, three hundred eighty-six thousand, six hundred sixty-eight".