163191956 has 12 divisors (see below), whose sum is σ = 285811680. Its totient is φ = 81531480.

The previous prime is 163191949. The next prime is 163191971. The reversal of 163191956 is 659191361.

It is a super-2 number, since 2×163191956² = 53263229006211872, which 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10190 + ... + 20741.

It is an arithmetic number, because the mean of its divisors is an integer number (23817640).

Almost surely, 2^163191956 is an apocalyptic number.

It is an amenable number.

163191956 is a deficient number, since it is larger than the sum of its proper divisors (122619724).

163191956 is a wasteful number, since it uses less digits than its factorization.

163191956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32254 (or 32252 counting only the distinct ones).

The product of its digits is 43740, while the sum is 41.

The square root of 163191956 is about 12774.6606999951. The cubic root of 163191956 is about 546.4699045662.

The spelling of 163191956 in words is "one hundred sixty-three million, one hundred ninety-one thousand, nine hundred fifty-six".