163601982389 has 2 divisors, whose sum is σ = 163601982390. Its totient is φ = 163601982388.

The previous prime is 163601982367. The next prime is 163601982403. The reversal of 163601982389 is 983289106361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163363897489 + 238084900 = 404183^2 + 15430^2 .

It is a cyclic number.

It is not a de Polignac number, because 163601982389 - 2²⁸ = 163333546933 is a prime.

It is a super-2 number, since 2×163601982389² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163601922389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81800991194 + 81800991195.

It is an arithmetic number, because the mean of its divisors is an integer number (81800991195).

Almost surely, 2^163601982389 is an apocalyptic number.

It is an amenable number.

163601982389 is a deficient number, since it is larger than the sum of its proper divisors (1).

163601982389 is an equidigital number, since it uses as much as digits as its factorization.

163601982389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 163601982389 in words is "one hundred sixty-three billion, six hundred one million, nine hundred eighty-two thousand, three hundred eighty-nine".