1155435811 has 2 divisors, whose sum is σ = 1155435812. Its totient is φ = 1155435810.

The previous prime is 1155435803. The next prime is 1155435817. The reversal of 1155435811 is 1185345511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155435811 - 2³ = 1155435803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155435817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577717905 + 577717906.

It is an arithmetic number, because the mean of its divisors is an integer number (577717906).

Almost surely, 2^1155435811 is an apocalyptic number.

1155435811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155435811 is an equidigital number, since it uses as much as digits as its factorization.

1155435811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 34.

The square root of 1155435811 is about 33991.7020903632. The cubic root of 1155435811 is about 1049.3376960102.

The spelling of 1155435811 in words is "one billion, one hundred fifty-five million, four hundred thirty-five thousand, eight hundred eleven".