63305398816889 has 2 divisors, whose sum is σ = 63305398816890. Its totient is φ = 63305398816888.

The previous prime is 63305398816873. The next prime is 63305398816909. The reversal of 63305398816889 is 98861889350336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62442157141225 + 863241675664 = 7902035^2 + 929108^2 .

It is a cyclic number.

It is not a de Polignac number, because 63305398816889 - 2⁴ = 63305398816873 is a prime.

It is not a weakly prime, because it can be changed into another prime (63305398810889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31652699408444 + 31652699408445.

It is an arithmetic number, because the mean of its divisors is an integer number (31652699408445).

Almost surely, 2^{63305398816889} is an apocalyptic number.

It is an amenable number.

63305398816889 is a deficient number, since it is larger than the sum of its proper divisors (1).

63305398816889 is an equidigital number, since it uses as much as digits as its factorization.

63305398816889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612431360, while the sum is 77.

The spelling of 63305398816889 in words is "sixty-three trillion, three hundred five billion, three hundred ninety-eight million, eight hundred sixteen thousand, eight hundred eighty-nine".