1163256643 has 2 divisors, whose sum is σ = 1163256644. Its totient is φ = 1163256642.

The previous prime is 1163256581. The next prime is 1163256649. The reversal of 1163256643 is 3466523611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1163256643 - 2⁹ = 1163256131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1163256649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581628321 + 581628322.

It is an arithmetic number, because the mean of its divisors is an integer number (581628322).

Almost surely, 2^1163256643 is an apocalyptic number.

1163256643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163256643 is an equidigital number, since it uses as much as digits as its factorization.

1163256643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 1163256643 is about 34106.5483888358. The cubic root of 1163256643 is about 1051.6999350817.

The spelling of 1163256643 in words is "one billion, one hundred sixty-three million, two hundred fifty-six thousand, six hundred forty-three".