168637842 has 32 divisors (see below), whose sum is σ = 387676800. Its totient is φ = 54273744.

The previous prime is 168637837. The next prime is 168637853. The reversal of 168637842 is 248736861.

168637842 is a `hidden beast` number, since 1 + 6 + 8 + 637 + 8 + 4 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52278 + ... + 55409.

It is an arithmetic number, because the mean of its divisors is an integer number (12114900).

Almost surely, 2^168637842 is an apocalyptic number.

168637842 is an abundant number, since it is smaller than the sum of its proper divisors (219038958).

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

168637842 is a wasteful number, since it uses less digits than its factorization.

168637842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107727 (or 107721 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 168637842 is about 12986.0633757887. The cubic root of 168637842 is about 552.4822699278.

The spelling of 168637842 in words is "one hundred sixty-eight million, six hundred thirty-seven thousand, eight hundred forty-two".