1718863668 has 72 divisors (see below), whose sum is σ = 4408024712. Its totient is φ = 564682752.

The previous prime is 1718863667. The next prime is 1718863681. The reversal of 1718863668 is 8663688171.

It can be written as a sum of positive squares in 4 ways, for example, as 62536464 + 1656327204 = 7908^2 + 40698^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1718863661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 966396 + ... + 968172.

Almost surely, 2^1718863668 is an apocalyptic number.

1718863668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1718863668 is an abundant number, since it is smaller than the sum of its proper divisors (2689161044).

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

1718863668 is a wasteful number, since it uses less digits than its factorization.

1718863668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2156 counting only the distinct ones).

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

The square root of 1718863668 is about 41459.1807444383. The cubic root of 1718863668 is about 1197.8813700406.

The spelling of 1718863668 in words is "one billion, seven hundred eighteen million, eight hundred sixty-three thousand, six hundred sixty-eight".