164173720 has 16 divisors (see below), whose sum is σ = 369390960. Its totient is φ = 65669472.

The previous prime is 164173703. The next prime is 164173721. The reversal of 164173720 is 27371461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164173721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2052132 + ... + 2052211.

It is an arithmetic number, because the mean of its divisors is an integer number (23086935).

Almost surely, 2^164173720 is an apocalyptic number.

164173720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164173720 is an abundant number, since it is smaller than the sum of its proper divisors (205217240).

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

164173720 is a wasteful number, since it uses less digits than its factorization.

164173720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104354 (or 4104350 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 164173720 is about 12813.0293061399. The cubic root of 164173720 is about 547.5635699697.

The spelling of 164173720 in words is "one hundred sixty-four million, one hundred seventy-three thousand, seven hundred twenty".