161152961 has 2 divisors, whose sum is σ = 161152962. Its totient is φ = 161152960.

The previous prime is 161152951. The next prime is 161153011. The reversal of 161152961 is 169251161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 7392961 = 12400^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 161152961 - 2⁶ = 161152897 is a prime.

It is not a weakly prime, because it can be changed into another prime (161152921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80576480 + 80576481.

It is an arithmetic number, because the mean of its divisors is an integer number (80576481).

Almost surely, 2^161152961 is an apocalyptic number.

It is an amenable number.

161152961 is a deficient number, since it is larger than the sum of its proper divisors (1).

161152961 is an equidigital number, since it uses as much as digits as its factorization.

161152961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 32.

The square root of 161152961 is about 12694.6036172856. The cubic root of 161152961 is about 544.1844109241.

The spelling of 161152961 in words is "one hundred sixty-one million, one hundred fifty-two thousand, nine hundred sixty-one".