161536769 has 2 divisors, whose sum is σ = 161536770. Its totient is φ = 161536768.

The previous prime is 161536763. The next prime is 161536789. The reversal of 161536769 is 967635161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150381169 + 11155600 = 12263^2 + 3340^2 .

It is an emirp because it is prime and its reverse (967635161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161536769 - 2¹² = 161532673 is a prime.

It is a super-2 number, since 2×161536769² = 52188255477918722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161536763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80768384 + 80768385.

It is an arithmetic number, because the mean of its divisors is an integer number (80768385).

Almost surely, 2^161536769 is an apocalyptic number.

It is an amenable number.

161536769 is a deficient number, since it is larger than the sum of its proper divisors (1).

161536769 is an equidigital number, since it uses as much as digits as its factorization.

161536769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 161536769 is about 12709.7116017634. The cubic root of 161536769 is about 544.6160851476.

It can be divided in two parts, 16153 and 6769, that added together give a palindrome (22922).

The spelling of 161536769 in words is "one hundred sixty-one million, five hundred thirty-six thousand, seven hundred sixty-nine".