689345121543986 has 8 divisors (see below), whose sum is σ = 1034030570563584. Its totient is φ = 344668264689460.

The previous prime is 689345121543977. The next prime is 689345121544007.

689345121543986 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147840690 + ... + 2148161613.

It is an arithmetic number, because the mean of its divisors is an integer number (129253821320448).

Almost surely, 2^{689345121543986} is an apocalyptic number.

689345121543986 is a deficient number, since it is larger than the sum of its proper divisors (344685449019598).

689345121543986 is a wasteful number, since it uses less digits than its factorization.

689345121543986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296082536.

The product of its digits is 1343692800, while the sum is 74.

The spelling of 689345121543986 in words is "six hundred eighty-nine trillion, three hundred forty-five billion, one hundred twenty-one million, five hundred forty-three thousand, nine hundred eighty-six".