164425505 has 32 divisors (see below), whose sum is σ = 217728000. Its totient is φ = 118784512.

The previous prime is 164425501. The next prime is 164425511. The reversal of 164425505 is 505524461.

164425505 = T₃₁₆ + T₃₁₇ + ... + T₁₀₀₅.

It is not a de Polignac number, because 164425505 - 2² = 164425501 is a prime.

It is a super-3 number, since 3×164425505³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164425501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156221 + ... + 157269.

It is an arithmetic number, because the mean of its divisors is an integer number (6804000).

Almost surely, 2^164425505 is an apocalyptic number.

It is an amenable number.

164425505 is a deficient number, since it is larger than the sum of its proper divisors (53302495).

164425505 is a wasteful number, since it uses less digits than its factorization.

164425505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 164425505 is about 12822.8508920598. The cubic root of 164425505 is about 547.8433505844.

Adding to 164425505 its reverse (505524461), we get a palindrome (669949966).

The spelling of 164425505 in words is "one hundred sixty-four million, four hundred twenty-five thousand, five hundred five".