164851640 has 16 divisors (see below), whose sum is σ = 370916280. Its totient is φ = 65940640.

The previous prime is 164851541. The next prime is 164851667. The reversal of 164851640 is 46158461.

It is a self number, because there is not a number n which added to its sum of digits gives 164851640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2060606 + ... + 2060685.

Almost surely, 2^164851640 is an apocalyptic number.

164851640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164851640 is an abundant number, since it is smaller than the sum of its proper divisors (206064640).

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

164851640 is a wasteful number, since it uses less digits than its factorization.

164851640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121302 (or 4121298 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 164851640 is about 12839.4563747847. The cubic root of 164851640 is about 548.3162168777.

The spelling of 164851640 in words is "one hundred sixty-four million, eight hundred fifty-one thousand, six hundred forty".