161040361 has 2 divisors, whose sum is σ = 161040362. Its totient is φ = 161040360.

The previous prime is 161040343. The next prime is 161040401. The reversal of 161040361 is 163040161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140564736 + 20475625 = 11856^2 + 4525^2 .

It is a cyclic number.

It is not a de Polignac number, because 161040361 - 2⁷ = 161040233 is a prime.

It is not a weakly prime, because it can be changed into another prime (161040331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80520180 + 80520181.

It is an arithmetic number, because the mean of its divisors is an integer number (80520181).

Almost surely, 2^161040361 is an apocalyptic number.

It is an amenable number.

161040361 is a deficient number, since it is larger than the sum of its proper divisors (1).

161040361 is an equidigital number, since it uses as much as digits as its factorization.

161040361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 161040361 is about 12690.1678869903. The cubic root of 161040361 is about 544.0576381133.

The spelling of 161040361 in words is "one hundred sixty-one million, forty thousand, three hundred sixty-one".