161336411 has 2 divisors, whose sum is σ = 161336412. Its totient is φ = 161336410.

The previous prime is 161336401. The next prime is 161336447. The reversal of 161336411 is 114633161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161336411 - 2¹⁰ = 161335387 is a prime.

It is not a weakly prime, because it can be changed into another prime (161336401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80668205 + 80668206.

It is an arithmetic number, because the mean of its divisors is an integer number (80668206).

Almost surely, 2^161336411 is an apocalyptic number.

161336411 is a deficient number, since it is larger than the sum of its proper divisors (1).

161336411 is an equidigital number, since it uses as much as digits as its factorization.

161336411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 161336411 is about 12701.8270732993. The cubic root of 161336411 is about 544.3908251127.

Adding to 161336411 its reverse (114633161), we get a palindrome (275969572).

The spelling of 161336411 in words is "one hundred sixty-one million, three hundred thirty-six thousand, four hundred eleven".