689762838659 has 16 divisors (see below), whose sum is σ = 767906788320. Its totient is φ = 616527260160.

The previous prime is 689762838623. The next prime is 689762838769. The reversal of 689762838659 is 956838267986.

It is a cyclic number.

It is not a de Polignac number, because 689762838659 - 2²⁰ = 689761790083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689762838659.

It is not an unprimeable number, because it can be changed into a prime (689762835659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11438069 + ... + 11498214.

It is an arithmetic number, because the mean of its divisors is an integer number (47994174270).

Almost surely, 2^689762838659 is an apocalyptic number.

689762838659 is a deficient number, since it is larger than the sum of its proper divisors (78143949661).

689762838659 is a wasteful number, since it uses less digits than its factorization.

689762838659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22936390.

The product of its digits is 1881169920, while the sum is 77.

The spelling of 689762838659 in words is "six hundred eighty-nine billion, seven hundred sixty-two million, eight hundred thirty-eight thousand, six hundred fifty-nine".