493454811789 has 12 divisors (see below), whose sum is σ = 712780887676. Its totient is φ = 328963954752.

The previous prime is 493454811749. The next prime is 493454811821. The reversal of 493454811789 is 987118454394.

493454811789 is a `hidden beast` number, since 4 + 9 + 3 + 4 + 548 + 1 + 1 + 7 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 461577566025 + 31877245764 = 679395^2 + 178542^2 .

It is not a de Polignac number, because 493454811789 - 2⁸ = 493454811533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493454811749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68259 + ... + 995775.

Almost surely, 2^493454811789 is an apocalyptic number.

It is an amenable number.

493454811789 is a deficient number, since it is larger than the sum of its proper divisors (219326075887).

493454811789 is a wasteful number, since it uses less digits than its factorization.

493454811789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986636 (or 986633 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 493454811789 in words is "four hundred ninety-three billion, four hundred fifty-four million, eight hundred eleven thousand, seven hundred eighty-nine".