161143351591 has 2 divisors, whose sum is σ = 161143351592. Its totient is φ = 161143351590.

The previous prime is 161143351547. The next prime is 161143351601. The reversal of 161143351591 is 195153341161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161143351591 - 2¹³ = 161143343399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161143351531) 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, 80571675795 + 80571675796.

It is an arithmetic number, because the mean of its divisors is an integer number (80571675796).

Almost surely, 2^161143351591 is an apocalyptic number.

161143351591 is a deficient number, since it is larger than the sum of its proper divisors (1).

161143351591 is an equidigital number, since it uses as much as digits as its factorization.

161143351591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 40.

The spelling of 161143351591 in words is "one hundred sixty-one billion, one hundred forty-three million, three hundred fifty-one thousand, five hundred ninety-one".