494978396771 has 4 divisors (see below), whose sum is σ = 495581294544. Its totient is φ = 494375499000.

The previous prime is 494978396753. The next prime is 494978396813. The reversal of 494978396771 is 177693879494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177693879494 = 2 ⋅88846939747.

It is a cyclic number.

It is not a de Polignac number, because 494978396771 - 2⁶ = 494978396707 is a prime.

It is a super-2 number, since 2×494978396771² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494978396071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301447655 + ... + 301449296.

It is an arithmetic number, because the mean of its divisors is an integer number (123895323636).

Almost surely, 2^494978396771 is an apocalyptic number.

494978396771 is a deficient number, since it is larger than the sum of its proper divisors (602897773).

494978396771 is an equidigital number, since it uses as much as digits as its factorization.

494978396771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602897772.

The product of its digits is 576108288, while the sum is 74.

The spelling of 494978396771 in words is "four hundred ninety-four billion, nine hundred seventy-eight million, three hundred ninety-six thousand, seven hundred seventy-one".