63195673889 has 2 divisors, whose sum is σ = 63195673890. Its totient is φ = 63195673888.

The previous prime is 63195673829. The next prime is 63195673927. The reversal of 63195673889 is 98837659136.

63195673889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59496966400 + 3698707489 = 243920^2 + 60817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63195673889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63195673829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31597836944 + 31597836945.

It is an arithmetic number, because the mean of its divisors is an integer number (31597836945).

Almost surely, 2^63195673889 is an apocalyptic number.

It is an amenable number.

63195673889 is a deficient number, since it is larger than the sum of its proper divisors (1).

63195673889 is an equidigital number, since it uses as much as digits as its factorization.

63195673889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 65.

The spelling of 63195673889 in words is "sixty-three billion, one hundred ninety-five million, six hundred seventy-three thousand, eight hundred eighty-nine".