164417725 has 6 divisors (see below), whose sum is σ = 203878010. Its totient is φ = 131534160.

The previous prime is 164417711. The next prime is 164417783. The reversal of 164417725 is 527714461.

It can be written as a sum of positive squares in 3 ways, for example, as 32558436 + 131859289 = 5706^2 + 11483^2 .

It is not a de Polignac number, because 164417725 - 2⁹ = 164417213 is a prime.

It is a super-3 number, since 3×164417725³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3288330 + ... + 3288379.

Almost surely, 2^164417725 is an apocalyptic number.

It is an amenable number.

164417725 is a deficient number, since it is larger than the sum of its proper divisors (39460285).

164417725 is an equidigital number, since it uses as much as digits as its factorization.

164417725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6576719 (or 6576714 counting only the distinct ones).

The product of its digits is 47040, while the sum is 37.

The square root of 164417725 is about 12822.5475237957. The cubic root of 164417725 is about 547.8347098152.

The spelling of 164417725 in words is "one hundred sixty-four million, four hundred seventeen thousand, seven hundred twenty-five".