163882013040721 has 2 divisors, whose sum is σ = 163882013040722. Its totient is φ = 163882013040720.

The previous prime is 163882013040719. The next prime is 163882013040763. The reversal of 163882013040721 is 127040310288361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159277297901121 + 4604715139600 = 12620511^2 + 2145860^2 .

It is a cyclic number.

It is not a de Polignac number, because 163882013040721 - 2¹ = 163882013040719 is a prime.

Together with 163882013040719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163882013010721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81941006520360 + 81941006520361.

It is an arithmetic number, because the mean of its divisors is an integer number (81941006520361).

Almost surely, 2^{163882013040721} is an apocalyptic number.

It is an amenable number.

163882013040721 is a deficient number, since it is larger than the sum of its proper divisors (1).

163882013040721 is an equidigital number, since it uses as much as digits as its factorization.

163882013040721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 163882013040721 in words is "one hundred sixty-three trillion, eight hundred eighty-two billion, thirteen million, forty thousand, seven hundred twenty-one".