39456443449 has 2 divisors, whose sum is σ = 39456443450. Its totient is φ = 39456443448.

The previous prime is 39456443381. The next prime is 39456443503. The reversal of 39456443449 is 94434465493.

39456443449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20887475625 + 18568967824 = 144525^2 + 136268^2 .

It is a cyclic number.

It is not a de Polignac number, because 39456443449 - 2¹⁵ = 39456410681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39456443449.

It is not a weakly prime, because it can be changed into another prime (39456443549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19728221724 + 19728221725.

It is an arithmetic number, because the mean of its divisors is an integer number (19728221725).

Almost surely, 2^39456443449 is an apocalyptic number.

It is an amenable number.

39456443449 is a deficient number, since it is larger than the sum of its proper divisors (1).

39456443449 is an equidigital number, since it uses as much as digits as its factorization.

39456443449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 55.

The spelling of 39456443449 in words is "thirty-nine billion, four hundred fifty-six million, four hundred forty-three thousand, four hundred forty-nine".