2168009550 has 336 divisors, whose sum is σ = 7172353440. Its totient is φ = 476824320.

The previous prime is 2168009539. The next prime is 2168009587. The reversal of 2168009550 is 559008612.

It is a happy number.

2168009550 is a `hidden beast` number, since 21 + 6 + 80 + 0 + 9 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 7399204 + ... + 7399496.

It is an arithmetic number, because the mean of its divisors is an integer number (21346290).

Almost surely, 2^2168009550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2168009550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3586176720).

2168009550 is an abundant number, since it is smaller than the sum of its proper divisors (5004343890).

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

2168009550 is a wasteful number, since it uses less digits than its factorization.

2168009550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 2168009550 is about 46561.8894590845. The cubic root of 2168009550 is about 1294.2566257787.

The spelling of 2168009550 in words is "two billion, one hundred sixty-eight million, nine thousand, five hundred fifty".