161589611 has 2 divisors, whose sum is σ = 161589612. Its totient is φ = 161589610.

The previous prime is 161589601. The next prime is 161589643. The reversal of 161589611 is 116985161.

161589611 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 not a de Polignac number, because 161589611 - 2¹⁴ = 161573227 is a prime.

It is a super-2 number, since 2×161589611² = 52222404766262642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161589601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80794805 + 80794806.

It is an arithmetic number, because the mean of its divisors is an integer number (80794806).

Almost surely, 2^161589611 is an apocalyptic number.

161589611 is a deficient number, since it is larger than the sum of its proper divisors (1).

161589611 is an equidigital number, since it uses as much as digits as its factorization.

161589611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 161589611 is about 12711.7902358401. The cubic root of 161589611 is about 544.6754637149.

The spelling of 161589611 in words is "one hundred sixty-one million, five hundred eighty-nine thousand, six hundred eleven".