674643748689 has 63 divisors (see below), whose sum is σ = 1048584656353. Its totient is φ = 433839478464.

The previous prime is 674643748687. The next prime is 674643748703. The reversal of 674643748689 is 986847346476.

The square root of 674643748689 is 821367.

It is a perfect power (a square), and thus also a powerful number.

674643748689 is a `hidden beast` number, since 6 + 7 + 4 + 64 + 3 + 7 + 486 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 154946938689 + 519696810000 = 393633^2 + 720900^2 .

It is not a de Polignac number, because 674643748689 - 2¹ = 674643748687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674643748687) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 643129837 + ... + 643130885.

Almost surely, 2^674643748689 is an apocalyptic number.

674643748689 is the 821367-th square number.

674643748689 is the 410684-th centered octagonal number.

It is an amenable number.

674643748689 is a deficient number, since it is larger than the sum of its proper divisors (373940907664).

674643748689 is an frugal number, since it uses more digits than its factorization.

674643748689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 1081 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 72.

The spelling of 674643748689 in words is "six hundred seventy-four billion, six hundred forty-three million, seven hundred forty-eight thousand, six hundred eighty-nine".