168651642 has 8 divisors (see below), whose sum is σ = 337303296. Its totient is φ = 56217212.

The previous prime is 168651631. The next prime is 168651647. The reversal of 168651642 is 246156861.

It is a happy number.

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

168651642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 168651642.

It is not an unprimeable number, because it can be changed into a prime (168651647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14054298 + ... + 14054309.

It is an arithmetic number, because the mean of its divisors is an integer number (42162912).

Almost surely, 2^168651642 is an apocalyptic number.

168651642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

168651642 is a wasteful number, since it uses less digits than its factorization.

168651642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28108612.

The product of its digits is 69120, while the sum is 39.

The square root of 168651642 is about 12986.5947037705. The cubic root of 168651642 is about 552.4973397905.

The spelling of 168651642 in words is "one hundred sixty-eight million, six hundred fifty-one thousand, six hundred forty-two".