164438725 has 24 divisors (see below), whose sum is σ = 229628160. Its totient is φ = 115728000.

The previous prime is 164438719. The next prime is 164438731. The reversal of 164438725 is 527834461.

It is an interprime number because it is at equal distance from previous prime (164438719) and next prime (164438731).

It is not a de Polignac number, because 164438725 - 2⁹ = 164438213 is a prime.

It is a super-3 number, since 3×164438725³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1120 + ... + 18169.

It is an arithmetic number, because the mean of its divisors is an integer number (9567840).

Almost surely, 2^164438725 is an apocalyptic number.

It is an amenable number.

164438725 is a deficient number, since it is larger than the sum of its proper divisors (65189435).

164438725 is a wasteful number, since it uses less digits than its factorization.

164438725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19341 (or 19336 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 164438725 is about 12823.3663676899. The cubic root of 164438725 is about 547.8580326030.

The spelling of 164438725 in words is "one hundred sixty-four million, four hundred thirty-eight thousand, seven hundred twenty-five".