689731797318 has 16 divisors (see below), whose sum is σ = 1390325514240. Its totient is φ = 228100279176.

The previous prime is 689731797311. The next prime is 689731797319. The reversal of 689731797318 is 813797137986.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689731797311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452579158 + ... + 452580681.

It is an arithmetic number, because the mean of its divisors is an integer number (86895344640).

Almost surely, 2^689731797318 is an apocalyptic number.

689731797318 is an abundant number, since it is smaller than the sum of its proper divisors (700593716922).

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

689731797318 is a wasteful number, since it uses less digits than its factorization.

689731797318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905159971.

The product of its digits is 96018048, while the sum is 69.

The spelling of 689731797318 in words is "six hundred eighty-nine billion, seven hundred thirty-one million, seven hundred ninety-seven thousand, three hundred eighteen".