1160867166581 has 2 divisors, whose sum is σ = 1160867166582. Its totient is φ = 1160867166580.

The previous prime is 1160867166463. The next prime is 1160867166649. The reversal of 1160867166581 is 1856617680611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870938764081 + 289928402500 = 933241^2 + 538450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1160867166581 - 2²² = 1160862972277 is a prime.

It is a super-2 number, since 2×1160867166581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1160867165581) 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, 580433583290 + 580433583291.

It is an arithmetic number, because the mean of its divisors is an integer number (580433583291).

Almost surely, 2^{1160867166581} is an apocalyptic number.

It is an amenable number.

1160867166581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1160867166581 is an equidigital number, since it uses as much as digits as its factorization.

1160867166581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 1160867166581 in words is "one trillion, one hundred sixty billion, eight hundred sixty-seven million, one hundred sixty-six thousand, five hundred eighty-one".