191471168 has 56 divisors (see below), whose sum is σ = 436180992. Its totient is φ = 81690624.

The previous prime is 191471143. The next prime is 191471173. The reversal of 191471168 is 861174191.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×191471168² = 73322416350568448, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 114305 + ... + 115967.

Almost surely, 2^191471168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191471168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218090496).

191471168 is an abundant number, since it is smaller than the sum of its proper divisors (244709824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191471168 is a wasteful number, since it uses less digits than its factorization.

191471168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1929 counting only the distinct ones).

The product of its digits is 12096, while the sum is 38.

The square root of 191471168 is about 13837.3107213794. The cubic root of 191471168 is about 576.3696829503.

The spelling of 191471168 in words is "one hundred ninety-one million, four hundred seventy-one thousand, one hundred sixty-eight".