3581969161 has 2 divisors, whose sum is σ = 3581969162. Its totient is φ = 3581969160.

The previous prime is 3581969159. The next prime is 3581969201. The reversal of 3581969161 is 1619691853.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3557526025 + 24443136 = 59645^2 + 4944^2 .

It is a cyclic number.

It is not a de Polignac number, because 3581969161 - 2¹ = 3581969159 is a prime.

Together with 3581969159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3581966161) 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, 1790984580 + 1790984581.

It is an arithmetic number, because the mean of its divisors is an integer number (1790984581).

Almost surely, 2^3581969161 is an apocalyptic number.

It is an amenable number.

3581969161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581969161 is an equidigital number, since it uses as much as digits as its factorization.

3581969161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 49.

The square root of 3581969161 is about 59849.5543926603. The cubic root of 3581969161 is about 1530.0558398747.

The spelling of 3581969161 in words is "three billion, five hundred eighty-one million, nine hundred sixty-nine thousand, one hundred sixty-one".