490816539889 has 9 divisors (see below), whose sum is σ = 531485760459. Its totient is φ = 453053014440.

The previous prime is 490816539883. The next prime is 490816539931. The reversal of 490816539889 is 988935618094.

The square root of 490816539889 is 700583.

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

It can be written as a sum of positive squares in only one way, i.e., 72605997025 + 418210542864 = 269455^2 + 646692^2 .

It is not a de Polignac number, because 490816539889 - 2⁹ = 490816539377 is a prime.

It is a super-2 number, since 2×490816539889² (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 (490816539883) 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 8 ways as a sum of consecutive naturals, for example, 9080634 + ... + 9134524.

Almost surely, 2^490816539889 is an apocalyptic number.

490816539889 is the 700583-rd square number.

490816539889 is the 350292-nd centered octagonal number.

It is an amenable number.

490816539889 is a deficient number, since it is larger than the sum of its proper divisors (40669220570).

490816539889 is an frugal number, since it uses more digits than its factorization.

490816539889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107808 (or 53904 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 70.

The spelling of 490816539889 in words is "four hundred ninety billion, eight hundred sixteen million, five hundred thirty-nine thousand, eight hundred eighty-nine".