168189550 has 12 divisors (see below), whose sum is σ = 312832656. Its totient is φ = 67275800.

The previous prime is 168189523. The next prime is 168189569. The reversal of 168189550 is 55981861.

168189550 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 168189497 and 168189506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1681846 + ... + 1681945.

It is an arithmetic number, because the mean of its divisors is an integer number (26069388).

Almost surely, 2^168189550 is an apocalyptic number.

168189550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168189550 is a deficient number, since it is larger than the sum of its proper divisors (144643106).

168189550 is a wasteful number, since it uses less digits than its factorization.

168189550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363803 (or 3363798 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 168189550 is about 12968.7913854761. The cubic root of 168189550 is about 551.9922787375.

The spelling of 168189550 in words is "one hundred sixty-eight million, one hundred eighty-nine thousand, five hundred fifty".