163891980269 has 2 divisors, whose sum is σ = 163891980270. Its totient is φ = 163891980268.

The previous prime is 163891980209. The next prime is 163891980337. The reversal of 163891980269 is 962089198361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163628340100 + 263640169 = 404510^2 + 16237^2 .

It is a cyclic number.

It is not a de Polignac number, because 163891980269 - 2²⁸ = 163623544813 is a prime.

It is a super-2 number, since 2×163891980269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163891980209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81945990134 + 81945990135.

It is an arithmetic number, because the mean of its divisors is an integer number (81945990135).

Almost surely, 2^163891980269 is an apocalyptic number.

It is an amenable number.

163891980269 is a deficient number, since it is larger than the sum of its proper divisors (1).

163891980269 is an equidigital number, since it uses as much as digits as its factorization.

163891980269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 163891980269 in words is "one hundred sixty-three billion, eight hundred ninety-one million, nine hundred eighty thousand, two hundred sixty-nine".