494642767985 has 8 divisors (see below), whose sum is σ = 594497333736. Its totient is φ = 395096872960.

The previous prime is 494642767973. The next prime is 494642767991. The reversal of 494642767985 is 589767246494.

It can be written as a sum of positive squares in 4 ways, for example, as 73391144464 + 421251623521 = 270908^2 + 649039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 494642767985 - 2⁶ = 494642767921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77164154 + ... + 77170563.

It is an arithmetic number, because the mean of its divisors is an integer number (74312166717).

Almost surely, 2^494642767985 is an apocalyptic number.

It is an amenable number.

494642767985 is a deficient number, since it is larger than the sum of its proper divisors (99854565751).

494642767985 is a wasteful number, since it uses less digits than its factorization.

494642767985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154335363.

The product of its digits is 731566080, while the sum is 71.

The spelling of 494642767985 in words is "four hundred ninety-four billion, six hundred forty-two million, seven hundred sixty-seven thousand, nine hundred eighty-five".