161166856079 has 2 divisors, whose sum is σ = 161166856080. Its totient is φ = 161166856078.

The previous prime is 161166856069. The next prime is 161166856127. The reversal of 161166856079 is 970658661161.

161166856079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161166856079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161166856069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80583428039 + 80583428040.

It is an arithmetic number, because the mean of its divisors is an integer number (80583428040).

Almost surely, 2^161166856079 is an apocalyptic number.

161166856079 is a deficient number, since it is larger than the sum of its proper divisors (1).

161166856079 is an equidigital number, since it uses as much as digits as its factorization.

161166856079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 161166856079 in words is "one hundred sixty-one billion, one hundred sixty-six million, eight hundred fifty-six thousand, seventy-nine".