163944168158 has 8 divisors (see below), whose sum is σ = 245925939240. Its totient is φ = 81968855080.

The previous prime is 163944168079. The next prime is 163944168197. The reversal of 163944168158 is 851861449361.

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

It is a super-2 number, since 2×163944168158² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1550528 + ... + 1652883.

It is an arithmetic number, because the mean of its divisors is an integer number (30740742405).

Almost surely, 2^163944168158 is an apocalyptic number.

163944168158 is a deficient number, since it is larger than the sum of its proper divisors (81981771082).

163944168158 is a wasteful number, since it uses less digits than its factorization.

163944168158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229002.

The product of its digits is 4976640, while the sum is 56.

The spelling of 163944168158 in words is "one hundred sixty-three billion, nine hundred forty-four million, one hundred sixty-eight thousand, one hundred fifty-eight".