161285611 has 2 divisors, whose sum is σ = 161285612. Its totient is φ = 161285610.

The previous prime is 161285603. The next prime is 161285633. The reversal of 161285611 is 116582161.

It is a weak prime.

It is an emirp because it is prime and its reverse (116582161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161285611 - 2³ = 161285603 is a prime.

It is not a weakly prime, because it can be changed into another prime (161285911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80642805 + 80642806.

It is an arithmetic number, because the mean of its divisors is an integer number (80642806).

Almost surely, 2^161285611 is an apocalyptic number.

161285611 is a deficient number, since it is larger than the sum of its proper divisors (1).

161285611 is an equidigital number, since it uses as much as digits as its factorization.

161285611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 31.

The square root of 161285611 is about 12699.8272035489. The cubic root of 161285611 is about 544.3336816635. Note that the first 3 decimals are identical.

The spelling of 161285611 in words is "one hundred sixty-one million, two hundred eighty-five thousand, six hundred eleven".