400422242449 has 2 divisors, whose sum is σ = 400422242450. Its totient is φ = 400422242448.

The previous prime is 400422242431. The next prime is 400422242459. The reversal of 400422242449 is 944242224004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310321414225 + 90100828224 = 557065^2 + 300168^2 .

It is a cyclic number.

It is not a de Polignac number, because 400422242449 - 2¹⁹ = 400421718161 is a prime.

It is not a weakly prime, because it can be changed into another prime (400422242459) 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, 200211121224 + 200211121225.

It is an arithmetic number, because the mean of its divisors is an integer number (200211121225).

Almost surely, 2^400422242449 is an apocalyptic number.

It is an amenable number.

400422242449 is a deficient number, since it is larger than the sum of its proper divisors (1).

400422242449 is an equidigital number, since it uses as much as digits as its factorization.

400422242449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 400422242449 in words is "four hundred billion, four hundred twenty-two million, two hundred forty-two thousand, four hundred forty-nine".