1155705651649 has 2 divisors, whose sum is σ = 1155705651650. Its totient is φ = 1155705651648.

The previous prime is 1155705651599. The next prime is 1155705651679. The reversal of 1155705651649 is 9461565075511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155556201024 + 149450625 = 1074968^2 + 12225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155705651649 - 2²¹ = 1155703554497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155705651649.

It is not a weakly prime, because it can be changed into another prime (1155705651679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577852825824 + 577852825825.

It is an arithmetic number, because the mean of its divisors is an integer number (577852825825).

Almost surely, 2^{1155705651649} is an apocalyptic number.

It is an amenable number.

1155705651649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155705651649 is an equidigital number, since it uses as much as digits as its factorization.

1155705651649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670000, while the sum is 55.

The spelling of 1155705651649 in words is "one trillion, one hundred fifty-five billion, seven hundred five million, six hundred fifty-one thousand, six hundred forty-nine".