689494942208 has 30 divisors (see below), whose sum is σ = 1377680756661. Its totient is φ = 344738076672.

The previous prime is 689494942193. The next prime is 689494942211. The reversal of 689494942208 is 802249494986.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 628963197184 + 60531745024 = 793072^2 + 246032^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=587152.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18770516 + ... + 18807212.

Almost surely, 2^689494942208 is an apocalyptic number.

It is an amenable number.

689494942208 is a deficient number, since it is larger than the sum of its proper divisors (688185814453).

689494942208 is an frugal number, since it uses more digits than its factorization.

689494942208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73412 (or 36699 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 689494942208 in words is "six hundred eighty-nine billion, four hundred ninety-four million, nine hundred forty-two thousand, two hundred eight".