63401855449 has 2 divisors, whose sum is σ = 63401855450. Its totient is φ = 63401855448.

The previous prime is 63401855437. The next prime is 63401855467. The reversal of 63401855449 is 94455810436.

63401855449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61739825625 + 1662029824 = 248475^2 + 40768^2 .

It is a cyclic number.

It is not a de Polignac number, because 63401855449 - 2¹⁷ = 63401724377 is a prime.

It is not a weakly prime, because it can be changed into another prime (63405855449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31700927724 + 31700927725.

It is an arithmetic number, because the mean of its divisors is an integer number (31700927725).

Almost surely, 2^63401855449 is an apocalyptic number.

It is an amenable number.

63401855449 is a deficient number, since it is larger than the sum of its proper divisors (1).

63401855449 is an equidigital number, since it uses as much as digits as its factorization.

63401855449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 63401855449 in words is "sixty-three billion, four hundred one million, eight hundred fifty-five thousand, four hundred forty-nine".