494407265881 has 3 divisors (see below), whose sum is σ = 494407969023. Its totient is φ = 494406562740.

The previous prime is 494407265879. The next prime is 494407265897. The reversal of 494407265881 is 188562704494.

The square root of 494407265881 is 703141.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188562704494 = 2 ⋅94281352247.

It can be written as a sum of positive squares in only one way, i.e., 84628046281 + 409779219600 = 290909^2 + 640140^2 .

It is not a de Polignac number, because 494407265881 - 2¹ = 494407265879 is a prime.

It is a super-2 number, since 2×494407265881² (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 (494407265801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 351571 + ... + 1054711.

It is an arithmetic number, because the mean of its divisors is an integer number (164802656341).

Almost surely, 2^494407265881 is an apocalyptic number.

494407265881 is the 703141-st square number.

494407265881 is the 351571-st centered octagonal number.

It is an amenable number.

494407265881 is a deficient number, since it is larger than the sum of its proper divisors (703142).

494407265881 is an frugal number, since it uses more digits than its factorization.

494407265881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406282 (or 703141 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 494407265881 in words is "four hundred ninety-four billion, four hundred seven million, two hundred sixty-five thousand, eight hundred eighty-one".