164743640 has 16 divisors (see below), whose sum is σ = 370673280. Its totient is φ = 65897440.

The previous prime is 164743627. The next prime is 164743729. The reversal of 164743640 is 46347461.

164743640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 164743640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059256 + ... + 2059335.

It is an arithmetic number, because the mean of its divisors is an integer number (23167080).

Almost surely, 2^164743640 is an apocalyptic number.

164743640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164743640 is an abundant number, since it is smaller than the sum of its proper divisors (205929640).

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

164743640 is a wasteful number, since it uses less digits than its factorization.

164743640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118602 (or 4118598 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 164743640 is about 12835.2499001772. The cubic root of 164743640 is about 548.1964504257.

The spelling of 164743640 in words is "one hundred sixty-four million, seven hundred forty-three thousand, six hundred forty".