168785550 has 108 divisors (see below), whose sum is σ = 479054160. Its totient is φ = 42599520.

The previous prime is 168785497. The next prime is 168785557. The reversal of 168785550 is 55587861.

168785550 is a `hidden beast` number, since 16 + 8 + 7 + 85 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 168785496 and 168785505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168785557) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 161931 + ... + 162969.

Almost surely, 2^168785550 is an apocalyptic number.

168785550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168785550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239527080).

168785550 is an abundant number, since it is smaller than the sum of its proper divisors (310268610).

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

168785550 is a wasteful number, since it uses less digits than its factorization.

168785550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The square root of 168785550 is about 12991.7493048473. The cubic root of 168785550 is about 552.6435272032.

The spelling of 168785550 in words is "one hundred sixty-eight million, seven hundred eighty-five thousand, five hundred fifty".