1155161641 has 2 divisors, whose sum is σ = 1155161642. Its totient is φ = 1155161640.

The previous prime is 1155161599. The next prime is 1155161653. The reversal of 1155161641 is 1461615511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917847616 + 237314025 = 30296^2 + 15405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155161641 - 2²⁵ = 1121607209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155161671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577580820 + 577580821.

It is an arithmetic number, because the mean of its divisors is an integer number (577580821).

Almost surely, 2^1155161641 is an apocalyptic number.

It is an amenable number.

1155161641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155161641 is an equidigital number, since it uses as much as digits as its factorization.

1155161641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 31.

The square root of 1155161641 is about 33987.6689550784. The cubic root of 1155161641 is about 1049.2546913488.

The spelling of 1155161641 in words is "one billion, one hundred fifty-five million, one hundred sixty-one thousand, six hundred forty-one".