164634625 has 16 divisors (see below), whose sum is σ = 205981776. Its totient is φ = 131376000.

The previous prime is 164634623. The next prime is 164634629. The reversal of 164634625 is 526436461.

It can be written as a sum of positive squares in 8 ways, for example, as 53816896 + 110817729 = 7336^2 + 10527^2 .

It is not a de Polignac number, because 164634625 - 2¹ = 164634623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164634623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56197 + ... + 59053.

It is an arithmetic number, because the mean of its divisors is an integer number (12873861).

Almost surely, 2^164634625 is an apocalyptic number.

It is an amenable number.

164634625 is a deficient number, since it is larger than the sum of its proper divisors (41347151).

164634625 is an equidigital number, since it uses as much as digits as its factorization.

164634625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3323 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 164634625 is about 12831.0024939597. The cubic root of 164634625 is about 548.0755052958.

The spelling of 164634625 in words is "one hundred sixty-four million, six hundred thirty-four thousand, six hundred twenty-five".