163974968943 has 8 divisors (see below), whose sum is σ = 218638338048. Its totient is φ = 109314122904.

The previous prime is 163974968939. The next prime is 163974969007. The reversal of 163974968943 is 349869479361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163974968943 - 2² = 163974968939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163974968933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473521 + ... + 743082.

It is an arithmetic number, because the mean of its divisors is an integer number (27329792256).

Almost surely, 2^163974968943 is an apocalyptic number.

163974968943 is a deficient number, since it is larger than the sum of its proper divisors (54663369105).

163974968943 is a wasteful number, since it uses less digits than its factorization.

163974968943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261533.

The product of its digits is 211631616, while the sum is 69.

The spelling of 163974968943 in words is "one hundred sixty-three billion, nine hundred seventy-four million, nine hundred sixty-eight thousand, nine hundred forty-three".