689839646938986 has 64 divisors (see below), whose sum is σ = 1515461578951680. Its totient is φ = 208369265829120.

The previous prime is 689839646938973. The next prime is 689839646939017.

689839646938986 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163445746 + ... + 167613218.

It is an arithmetic number, because the mean of its divisors is an integer number (23679087171120).

Almost surely, 2^{689839646938986} is an apocalyptic number.

689839646938986 is an abundant number, since it is smaller than the sum of its proper divisors (825621932012694).

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

689839646938986 is a wasteful number, since it uses less digits than its factorization.

689839646938986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4230651.

The product of its digits is 1253826625536, while the sum is 102.

The spelling of 689839646938986 in words is "six hundred eighty-nine trillion, eight hundred thirty-nine billion, six hundred forty-six million, nine hundred thirty-eight thousand, nine hundred eighty-six".