63405855449 has 2 divisors, whose sum is σ = 63405855450. Its totient is φ = 63405855448.

The previous prime is 63405855421. The next prime is 63405855463. The reversal of 63405855449 is 94455850436.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53589009049 + 9816846400 = 231493^2 + 99080^2 .

It is a cyclic number.

It is not a de Polignac number, because 63405855449 - 2¹⁶ = 63405789913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63405855449.

It is not a weakly prime, because it can be changed into another prime (63405855049) 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, 31702927724 + 31702927725.

It is an arithmetic number, because the mean of its divisors is an integer number (31702927725).

Almost surely, 2^63405855449 is an apocalyptic number.

It is an amenable number.

63405855449 is a deficient number, since it is larger than the sum of its proper divisors (1).

63405855449 is an equidigital number, since it uses as much as digits as its factorization.

63405855449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 63405855449 in words is "sixty-three billion, four hundred five million, eight hundred fifty-five thousand, four hundred forty-nine".