63854342989 has 2 divisors, whose sum is σ = 63854342990. Its totient is φ = 63854342988.

The previous prime is 63854342983. The next prime is 63854343001. The reversal of 63854342989 is 98924345836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62562515625 + 1291827364 = 250125^2 + 35942^2 .

It is a cyclic number.

It is not a de Polignac number, because 63854342989 - 2⁷ = 63854342861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63854342983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31927171494 + 31927171495.

It is an arithmetic number, because the mean of its divisors is an integer number (31927171495).

Almost surely, 2^63854342989 is an apocalyptic number.

It is an amenable number.

63854342989 is a deficient number, since it is larger than the sum of its proper divisors (1).

63854342989 is an equidigital number, since it uses as much as digits as its factorization.

63854342989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 61.

The spelling of 63854342989 in words is "sixty-three billion, eight hundred fifty-four million, three hundred forty-two thousand, nine hundred eighty-nine".