161140223989 has 2 divisors, whose sum is σ = 161140223990. Its totient is φ = 161140223988.

The previous prime is 161140223987. The next prime is 161140224013. The reversal of 161140223989 is 989322041161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113008251889 + 48131972100 = 336167^2 + 219390^2 .

It is a cyclic number.

It is not a de Polignac number, because 161140223989 - 2¹ = 161140223987 is a prime.

Together with 161140223987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161140223987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80570111994 + 80570111995.

It is an arithmetic number, because the mean of its divisors is an integer number (80570111995).

Almost surely, 2^161140223989 is an apocalyptic number.

It is an amenable number.

161140223989 is a deficient number, since it is larger than the sum of its proper divisors (1).

161140223989 is an equidigital number, since it uses as much as digits as its factorization.

161140223989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 161140223989 in words is "one hundred sixty-one billion, one hundred forty million, two hundred twenty-three thousand, nine hundred eighty-nine".