6446201689 has 2 divisors, whose sum is σ = 6446201690. Its totient is φ = 6446201688.

The previous prime is 6446201633. The next prime is 6446201701. The reversal of 6446201689 is 9861026446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4772737225 + 1673464464 = 69085^2 + 40908^2 .

It is a cyclic number.

It is not a de Polignac number, because 6446201689 - 2⁷ = 6446201561 is a prime.

It is not a weakly prime, because it can be changed into another prime (6446201609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223100844 + 3223100845.

It is an arithmetic number, because the mean of its divisors is an integer number (3223100845).

Almost surely, 2^6446201689 is an apocalyptic number.

It is an amenable number.

6446201689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446201689 is an equidigital number, since it uses as much as digits as its factorization.

6446201689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 6446201689 is about 80288.2412872520. The cubic root of 6446201689 is about 1861.0925181553.

The spelling of 6446201689 in words is "six billion, four hundred forty-six million, two hundred one thousand, six hundred eighty-nine".