163946184834431 has 4 divisors (see below), whose sum is σ = 164311321104000. Its totient is φ = 163581048564864.

The previous prime is 163946184834349. The next prime is 163946184834433. The reversal of 163946184834431 is 134438481649361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163946184834431 is a prime.

It is a super-2 number, since 2×163946184834431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163946184834433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182568134111 + ... + 182568135008.

It is an arithmetic number, because the mean of its divisors is an integer number (41077830276000).

Almost surely, 2^{163946184834431} is an apocalyptic number.

163946184834431 is a deficient number, since it is larger than the sum of its proper divisors (365136269569).

163946184834431 is an equidigital number, since it uses as much as digits as its factorization.

163946184834431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365136269568.

The product of its digits is 143327232, while the sum is 65.

The spelling of 163946184834431 in words is "one hundred sixty-three trillion, nine hundred forty-six billion, one hundred eighty-four million, eight hundred thirty-four thousand, four hundred thirty-one".