718683987989 has 8 divisors (see below), whose sum is σ = 786387537120. Its totient is φ = 651375212400.

The previous prime is 718683987947. The next prime is 718683987991. The reversal of 718683987989 is 989789386817.

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

It is not a de Polignac number, because 718683987989 - 2¹² = 718683983893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718680987989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98689574 + ... + 98696855.

It is an arithmetic number, because the mean of its divisors is an integer number (98298442140).

Almost surely, 2^718683987989 is an apocalyptic number.

It is an amenable number.

718683987989 is a deficient number, since it is larger than the sum of its proper divisors (67703549131).

718683987989 is a wasteful number, since it uses less digits than its factorization.

718683987989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197386771.

The product of its digits is 2633637888, while the sum is 83.

The spelling of 718683987989 in words is "seven hundred eighteen billion, six hundred eighty-three million, nine hundred eighty-seven thousand, nine hundred eighty-nine".