161482681 has 2 divisors, whose sum is σ = 161482682. Its totient is φ = 161482680.

The previous prime is 161482661. The next prime is 161482687. The reversal of 161482681 is 186284161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 30151081 = 11460^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 161482681 - 2²⁷ = 27264953 is a prime.

It is a super-2 number, since 2×161482681² = 52153312525895522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161482681.

It is not a weakly prime, because it can be changed into another prime (161482687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80741340 + 80741341.

It is an arithmetic number, because the mean of its divisors is an integer number (80741341).

Almost surely, 2^161482681 is an apocalyptic number.

It is an amenable number.

161482681 is a deficient number, since it is larger than the sum of its proper divisors (1).

161482681 is an equidigital number, since it uses as much as digits as its factorization.

161482681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 161482681 is about 12707.5836019284. The cubic root of 161482681 is about 544.5552930374. Note that the first 3 decimals are identical.

The spelling of 161482681 in words is "one hundred sixty-one million, four hundred eighty-two thousand, six hundred eighty-one".