164128650 has 144 divisors (see below), whose sum is σ = 492093504. Its totient is φ = 35458560.

The previous prime is 164128637. The next prime is 164128687. The reversal of 164128650 is 56821461.

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 71 ways as a sum of consecutive naturals, for example, 378834 + ... + 379266.

It is an arithmetic number, because the mean of its divisors is an integer number (3417316).

Almost surely, 2^164128650 is an apocalyptic number.

164128650 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 164128650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246046752).

164128650 is an abundant number, since it is smaller than the sum of its proper divisors (327964854).

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

164128650 is a wasteful number, since it uses less digits than its factorization.

164128650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 164128650 is about 12811.2704288060. The cubic root of 164128650 is about 547.5134585211.

The spelling of 164128650 in words is "one hundred sixty-four million, one hundred twenty-eight thousand, six hundred fifty".