826613727489 has 27 divisors (see below), whose sum is σ = 1312458229537. Its totient is φ = 500959833000.

The previous prime is 826613727469. The next prime is 826613727497. The reversal of 826613727489 is 984727316628.

The square root of 826613727489 is 909183.

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

826613727489 is a `hidden beast` number, since 8 + 2 + 6 + 613 + 7 + 2 + 7 + 4 + 8 + 9 = 666.

It is not a de Polignac number, because 826613727489 - 2²⁷ = 826479509761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (826613727409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29989264 + ... + 30016814.

Almost surely, 2^826613727489 is an apocalyptic number.

826613727489 is the 909183-rd square number.

826613727489 is the 454592-nd centered octagonal number.

It is an amenable number.

826613727489 is a deficient number, since it is larger than the sum of its proper divisors (485844502048).

826613727489 is an frugal number, since it uses more digits than its factorization.

826613727489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55130 (or 27565 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 826613727489 in words is "eight hundred twenty-six billion, six hundred thirteen million, seven hundred twenty-seven thousand, four hundred eighty-nine".