1163011643 has 2 divisors, whose sum is σ = 1163011644. Its totient is φ = 1163011642.

The previous prime is 1163011571. The next prime is 1163011649. The reversal of 1163011643 is 3461103611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1163011643 - 2⁸ = 1163011387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1163011649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581505821 + 581505822.

It is an arithmetic number, because the mean of its divisors is an integer number (581505822).

Almost surely, 2^1163011643 is an apocalyptic number.

1163011643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163011643 is an equidigital number, since it uses as much as digits as its factorization.

1163011643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1163011643 is about 34102.9565140619. The cubic root of 1163011643 is about 1051.6260950920.

The spelling of 1163011643 in words is "one billion, one hundred sixty-three million, eleven thousand, six hundred forty-three".