161036611 has 2 divisors, whose sum is σ = 161036612. Its totient is φ = 161036610.

The previous prime is 161036573. The next prime is 161036653. The reversal of 161036611 is 116630161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161036611 is a prime.

It is not a weakly prime, because it can be changed into another prime (161036671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80518305 + 80518306.

It is an arithmetic number, because the mean of its divisors is an integer number (80518306).

Almost surely, 2^161036611 is an apocalyptic number.

161036611 is a deficient number, since it is larger than the sum of its proper divisors (1).

161036611 is an equidigital number, since it uses as much as digits as its factorization.

161036611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 161036611 is about 12690.0201339478. The cubic root of 161036611 is about 544.0534150892.

Adding to 161036611 its reverse (116630161), we get a palindrome (277666772).

The spelling of 161036611 in words is "one hundred sixty-one million, thirty-six thousand, six hundred eleven".