164100025 has 6 divisors (see below), whose sum is σ = 203484062. Its totient is φ = 131280000.

The previous prime is 164099989. The next prime is 164100037. The reversal of 164100025 is 520001461.

It can be written as a sum of positive squares in 3 ways, for example, as 157609 + 163942416 = 397^2 + 12804^2 .

It is not a de Polignac number, because 164100025 - 2²⁵ = 130545593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164099975 and 164100011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3281976 + ... + 3282025.

Almost surely, 2^164100025 is an apocalyptic number.

It is an amenable number.

164100025 is a deficient number, since it is larger than the sum of its proper divisors (39384037).

164100025 is an equidigital number, since it uses as much as digits as its factorization.

164100025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564011 (or 6564006 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 164100025 is about 12810.1531997084. The cubic root of 164100025 is about 547.4816268168.

Adding to 164100025 its reverse (520001461), we get a palindrome (684101486).

The spelling of 164100025 in words is "one hundred sixty-four million, one hundred thousand, twenty-five".