6432278789 has 2 divisors, whose sum is σ = 6432278790. Its totient is φ = 6432278788.

The previous prime is 6432278767. The next prime is 6432278849. The reversal of 6432278789 is 9878722346.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4731376225 + 1700902564 = 68785^2 + 41242^2 .

It is a cyclic number.

It is not a de Polignac number, because 6432278789 - 2⁸ = 6432278533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6432278719) 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, 3216139394 + 3216139395.

It is an arithmetic number, because the mean of its divisors is an integer number (3216139395).

Almost surely, 2^6432278789 is an apocalyptic number.

It is an amenable number.

6432278789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6432278789 is an equidigital number, since it uses as much as digits as its factorization.

6432278789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 56.

The square root of 6432278789 is about 80201.4886956595. The cubic root of 6432278789 is about 1859.7516519115.

The spelling of 6432278789 in words is "six billion, four hundred thirty-two million, two hundred seventy-eight thousand, seven hundred eighty-nine".