168143553 has 16 divisors (see below), whose sum is σ = 249664960.
Its totient is φ = 111842208.
The previous prime is 168143533. The next prime is 168143557. The reversal of 168143553 is 355341861.
168143553 is a `hidden beast` number, since 1 + 68 + 1 + 43 + 553 = 666.
It is not a de Polignac number, because 168143553 - 26 = 168143489 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (168143557) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5526 + ... + 19152.
It is an arithmetic number, because the mean of its divisors is an integer number (15604060).
Almost surely, 2168143553 is an apocalyptic number.
It is an amenable number.
168143553 is a deficient number, since it is larger than the sum of its proper divisors (81521407).
168143553 is a wasteful number, since it uses less digits than its factorization.
168143553 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 14093 (or 14087 counting only the distinct ones).
The product of its digits is 43200, while the sum is 36.
The square root of 168143553 is about 12967.0178915586.
The cubic root of 168143553 is about 551.9419539625.
The spelling of 168143553 in words is "one hundred sixty-eight million, one hundred forty-three thousand, five hundred fifty-three".