6563156940943 has 2 divisors, whose sum is σ = 6563156940944. Its totient is φ = 6563156940942.

The previous prime is 6563156940889. The next prime is 6563156940959. The reversal of 6563156940943 is 3490496513656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6563156940943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6563156947943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3281578470471 + 3281578470472.

It is an arithmetic number, because the mean of its divisors is an integer number (3281578470472).

Almost surely, 2^{6563156940943} is an apocalyptic number.

6563156940943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6563156940943 is an equidigital number, since it uses as much as digits as its factorization.

6563156940943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62985600, while the sum is 61.

The spelling of 6563156940943 in words is "six trillion, five hundred sixty-three billion, one hundred fifty-six million, nine hundred forty thousand, nine hundred forty-three".