160891588430981 has 2 divisors, whose sum is σ = 160891588430982. Its totient is φ = 160891588430980.

The previous prime is 160891588430957. The next prime is 160891588431001. The reversal of 160891588430981 is 189034885198061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160038717710881 + 852870720100 = 12650641^2 + 923510^2 .

It is a cyclic number.

It is not a de Polignac number, because 160891588430981 - 2¹⁸ = 160891588168837 is a prime.

It is a super-2 number, since 2×160891588430981² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160891588430281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80445794215490 + 80445794215491.

It is an arithmetic number, because the mean of its divisors is an integer number (80445794215491).

Almost surely, 2^{160891588430981} is an apocalyptic number.

It is an amenable number.

160891588430981 is a deficient number, since it is larger than the sum of its proper divisors (1).

160891588430981 is an equidigital number, since it uses as much as digits as its factorization.

160891588430981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119439360, while the sum is 71.

The spelling of 160891588430981 in words is "one hundred sixty trillion, eight hundred ninety-one billion, five hundred eighty-eight million, four hundred thirty thousand, nine hundred eighty-one".