168425136 has 240 divisors, whose sum is σ = 559547520. Its totient is φ = 48090240.

The previous prime is 168425119. The next prime is 168425143. The reversal of 168425136 is 631524861.

It is a happy number.

It is a super-3 number, since 3×168425136³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 168425136.

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 47 ways as a sum of consecutive naturals, for example, 2513775 + ... + 2513841.

It is an arithmetic number, because the mean of its divisors is an integer number (2331448).

Almost surely, 2^168425136 is an apocalyptic number.

168425136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168425136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279773760).

168425136 is an abundant number, since it is smaller than the sum of its proper divisors (391122384).

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

168425136 is a wasteful number, since it uses less digits than its factorization.

168425136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 106 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 168425136 is about 12977.8710118417. The cubic root of 168425136 is about 552.2498868608.

Adding to 168425136 its reverse (631524861), we get a palindrome (799949997).

The spelling of 168425136 in words is "one hundred sixty-eight million, four hundred twenty-five thousand, one hundred thirty-six".