16405482161 has 2 divisors, whose sum is σ = 16405482162. Its totient is φ = 16405482160.

The previous prime is 16405482139. The next prime is 16405482167. The reversal of 16405482161 is 16128450461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16404742561 + 739600 = 128081^2 + 860^2 .

It is an emirp because it is prime and its reverse (16128450461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16405482161 is a prime.

It is not a weakly prime, because it can be changed into another prime (16405482167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202741080 + 8202741081.

It is an arithmetic number, because the mean of its divisors is an integer number (8202741081).

Almost surely, 2^16405482161 is an apocalyptic number.

It is an amenable number.

16405482161 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405482161 is an equidigital number, since it uses as much as digits as its factorization.

16405482161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 16405482161 in words is "sixteen billion, four hundred five million, four hundred eighty-two thousand, one hundred sixty-one".