685612707216586 has 4 divisors (see below), whose sum is σ = 1028419060824882. Its totient is φ = 342806353608292.

The previous prime is 685612707216523. The next prime is 685612707216643.

685612707216586 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 486387076014225 + 199225631202361 = 22054185^2 + 14114731^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171403176804145 + ... + 171403176804148.

Almost surely, 2^{685612707216586} is an apocalyptic number.

685612707216586 is a deficient number, since it is larger than the sum of its proper divisors (342806353608296).

685612707216586 is a wasteful number, since it uses less digits than its factorization.

685612707216586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342806353608295.

The product of its (nonzero) digits is 406425600, while the sum is 70.

The spelling of 685612707216586 in words is "six hundred eighty-five trillion, six hundred twelve billion, seven hundred seven million, two hundred sixteen thousand, five hundred eighty-six".