826661601449 has 2 divisors, whose sum is σ = 826661601450. Its totient is φ = 826661601448.

The previous prime is 826661601373. The next prime is 826661601487. The reversal of 826661601449 is 944106166628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499742955625 + 326918645824 = 706925^2 + 571768^2 .

It is a cyclic number.

It is not a de Polignac number, because 826661601449 - 2²⁰ = 826660552873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 826661601449.

It is not a weakly prime, because it can be changed into another prime (826661601349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413330800724 + 413330800725.

It is an arithmetic number, because the mean of its divisors is an integer number (413330800725).

Almost surely, 2^826661601449 is an apocalyptic number.

It is an amenable number.

826661601449 is a deficient number, since it is larger than the sum of its proper divisors (1).

826661601449 is an equidigital number, since it uses as much as digits as its factorization.

826661601449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 826661601449 in words is "eight hundred twenty-six billion, six hundred sixty-one million, six hundred one thousand, four hundred forty-nine".