161800395307 has 2 divisors, whose sum is σ = 161800395308. Its totient is φ = 161800395306.

The previous prime is 161800395277. The next prime is 161800395329. The reversal of 161800395307 is 703593008161.

It is a strong prime.

It is an emirp because it is prime and its reverse (703593008161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161800395307 is a prime.

It is not a weakly prime, because it can be changed into another prime (161800395007) 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, 80900197653 + 80900197654.

It is an arithmetic number, because the mean of its divisors is an integer number (80900197654).

Almost surely, 2^161800395307 is an apocalyptic number.

161800395307 is a deficient number, since it is larger than the sum of its proper divisors (1).

161800395307 is an equidigital number, since it uses as much as digits as its factorization.

161800395307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 161800395307 in words is "one hundred sixty-one billion, eight hundred million, three hundred ninety-five thousand, three hundred seven".