6331778778583 has 2 divisors, whose sum is σ = 6331778778584. Its totient is φ = 6331778778582.

The previous prime is 6331778778529. The next prime is 6331778778593. The reversal of 6331778778583 is 3858778771336.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6331778778583 - 2⁹ = 6331778778071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6331778778593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165889389291 + 3165889389292.

It is an arithmetic number, because the mean of its divisors is an integer number (3165889389292).

Almost surely, 2^{6331778778583} is an apocalyptic number.

6331778778583 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331778778583 is an equidigital number, since it uses as much as digits as its factorization.

6331778778583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995742720, while the sum is 73.

The spelling of 6331778778583 in words is "six trillion, three hundred thirty-one billion, seven hundred seventy-eight million, seven hundred seventy-eight thousand, five hundred eighty-three".