674809632729 has 6 divisors (see below), whose sum is σ = 974725025066. Its totient is φ = 449873088480.

The previous prime is 674809632719. The next prime is 674809632751. The reversal of 674809632729 is 927236908476.

674809632729 is a `hidden beast` number, since 67 + 480 + 96 + 3 + 2 + 7 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 651050493129 + 23759139600 = 806877^2 + 154140^2 .

It is not a de Polignac number, because 674809632729 - 2¹³ = 674809624537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (674809632719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37489424032 + ... + 37489424049.

Almost surely, 2^674809632729 is an apocalyptic number.

It is an amenable number.

674809632729 is a deficient number, since it is larger than the sum of its proper divisors (299915392337).

674809632729 is a wasteful number, since it uses less digits than its factorization.

674809632729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74978848087 (or 74978848084 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 674809632729 in words is "six hundred seventy-four billion, eight hundred nine million, six hundred thirty-two thousand, seven hundred twenty-nine".