1155761641 has 2 divisors, whose sum is σ = 1155761642. Its totient is φ = 1155761640.

The previous prime is 1155761603. The next prime is 1155761657. The reversal of 1155761641 is 1461675511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748569600 + 407192041 = 27360^2 + 20179^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155761641 - 2⁹ = 1155761129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155761641.

It is not a weakly prime, because it can be changed into another prime (1155761681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577880820 + 577880821.

It is an arithmetic number, because the mean of its divisors is an integer number (577880821).

Almost surely, 2^1155761641 is an apocalyptic number.

It is an amenable number.

1155761641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155761641 is an equidigital number, since it uses as much as digits as its factorization.

1155761641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 1155761641 is about 33996.4945398787. The cubic root of 1155761641 is about 1049.4363236058.

The spelling of 1155761641 in words is "one billion, one hundred fifty-five million, seven hundred sixty-one thousand, six hundred forty-one".