6394490585289 has 81 divisors (see below), whose sum is σ = 9902639005077. Its totient is φ = 3975411034368.

The previous prime is 6394490585243. The next prime is 6394490585291. The reversal of 6394490585289 is 9825850944936.

The square root of 6394490585289 is 2528733.

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

6394490585289 is a `hidden beast` number, since 6 + 3 + 9 + 4 + 4 + 90 + 5 + 8 + 528 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 24419375289 + 6370071210000 = 156267^2 + 2523900^2 .

It is not a de Polignac number, because 6394490585289 - 2⁹ = 6394490584777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6394490584289) 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 80 ways as a sum of consecutive naturals, for example, 23084803419 + ... + 23084803695.

Almost surely, 2^{6394490585289} is an apocalyptic number.

6394490585289 is the 2528733-rd square number.

6394490585289 is the 1264367-th centered octagonal number.

It is an amenable number.

6394490585289 is a deficient number, since it is larger than the sum of its proper divisors (3508148419788).

6394490585289 is an equidigital number, since it uses as much as digits as its factorization.

6394490585289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 671846400, while the sum is 72.

The spelling of 6394490585289 in words is "six trillion, three hundred ninety-four billion, four hundred ninety million, five hundred eighty-five thousand, two hundred eighty-nine".