881163581 has 2 divisors, whose sum is σ = 881163582. Its totient is φ = 881163580.

The previous prime is 881163559. The next prime is 881163733. The reversal of 881163581 is 185361188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880071556 + 1092025 = 29666^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881163581 is a prime.

It is a super-2 number, since 2×881163581² = 1552898512961487122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881163541) 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, 440581790 + 440581791.

It is an arithmetic number, because the mean of its divisors is an integer number (440581791).

Almost surely, 2^881163581 is an apocalyptic number.

It is an amenable number.

881163581 is a deficient number, since it is larger than the sum of its proper divisors (1).

881163581 is an equidigital number, since it uses as much as digits as its factorization.

881163581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 41.

The square root of 881163581 is about 29684.3996233712. The cubic root of 881163581 is about 958.7061494155.

The spelling of 881163581 in words is "eight hundred eighty-one million, one hundred sixty-three thousand, five hundred eighty-one".