63421441549 has 2 divisors, whose sum is σ = 63421441550. Its totient is φ = 63421441548.

The previous prime is 63421441541. The next prime is 63421441607. The reversal of 63421441549 is 94514412436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59687376100 + 3734065449 = 244310^2 + 61107^2 .

It is a cyclic number.

It is not a de Polignac number, because 63421441549 - 2³ = 63421441541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63421441541) 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, 31710720774 + 31710720775.

It is an arithmetic number, because the mean of its divisors is an integer number (31710720775).

Almost surely, 2^63421441549 is an apocalyptic number.

It is an amenable number.

63421441549 is a deficient number, since it is larger than the sum of its proper divisors (1).

63421441549 is an equidigital number, since it uses as much as digits as its factorization.

63421441549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The spelling of 63421441549 in words is "sixty-three billion, four hundred twenty-one million, four hundred forty-one thousand, five hundred forty-nine".