6406136244449 has 2 divisors, whose sum is σ = 6406136244450. Its totient is φ = 6406136244448.

The previous prime is 6406136244433. The next prime is 6406136244589. The reversal of 6406136244449 is 9444426316046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4188702543424 + 2217433701025 = 2046632^2 + 1489105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6406136244449 - 2⁴ = 6406136244433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6406136244449.

It is not a weakly prime, because it can be changed into another prime (6406136244049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203068122224 + 3203068122225.

It is an arithmetic number, because the mean of its divisors is an integer number (3203068122225).

Almost surely, 2^{6406136244449} is an apocalyptic number.

It is an amenable number.

6406136244449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406136244449 is an equidigital number, since it uses as much as digits as its factorization.

6406136244449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 53.

The spelling of 6406136244449 in words is "six trillion, four hundred six billion, one hundred thirty-six million, two hundred forty-four thousand, four hundred forty-nine".