161886186743 has 2 divisors, whose sum is σ = 161886186744. Its totient is φ = 161886186742.

The previous prime is 161886186719. The next prime is 161886186751. The reversal of 161886186743 is 347681688161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161886186743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161886188743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80943093371 + 80943093372.

It is an arithmetic number, because the mean of its divisors is an integer number (80943093372).

Almost surely, 2^161886186743 is an apocalyptic number.

161886186743 is a deficient number, since it is larger than the sum of its proper divisors (1).

161886186743 is an equidigital number, since it uses as much as digits as its factorization.

161886186743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 59.

The spelling of 161886186743 in words is "one hundred sixty-one billion, eight hundred eighty-six million, one hundred eighty-six thousand, seven hundred forty-three".