42404402449 has 2 divisors, whose sum is σ = 42404402450. Its totient is φ = 42404402448.

The previous prime is 42404402441. The next prime is 42404402473. The reversal of 42404402449 is 94420440424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42304262400 + 100140049 = 205680^2 + 10007^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404402449 - 2³ = 42404402441 is a prime.

It is not a weakly prime, because it can be changed into another prime (42404402441) 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, 21202201224 + 21202201225.

It is an arithmetic number, because the mean of its divisors is an integer number (21202201225).

Almost surely, 2^42404402449 is an apocalyptic number.

It is an amenable number.

42404402449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42404402449 is an equidigital number, since it uses as much as digits as its factorization.

42404402449 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 42404402449 in words is "forty-two billion, four hundred four million, four hundred two thousand, four hundred forty-nine".