1155782058161 has 2 divisors, whose sum is σ = 1155782058162. Its totient is φ = 1155782058160.

The previous prime is 1155782058149. The next prime is 1155782058289. The reversal of 1155782058161 is 1618502875511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1070564771761 + 85217286400 = 1034681^2 + 291920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155782058161 - 2³⁸ = 880904151217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155782058121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577891029080 + 577891029081.

It is an arithmetic number, because the mean of its divisors is an integer number (577891029081).

Almost surely, 2^{1155782058161} is an apocalyptic number.

It is an amenable number.

1155782058161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155782058161 is an equidigital number, since it uses as much as digits as its factorization.

1155782058161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672000, while the sum is 50.

The spelling of 1155782058161 in words is "one trillion, one hundred fifty-five billion, seven hundred eighty-two million, fifty-eight thousand, one hundred sixty-one".