164432505 has 8 divisors (see below), whose sum is σ = 263092032. Its totient is φ = 87697328.

The previous prime is 164432501. The next prime is 164432519. The reversal of 164432505 is 505234461.

164432505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164432505 - 2² = 164432501 is a prime.

It is a super-3 number, since 3×164432505³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164432501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5481069 + ... + 5481098.

It is an arithmetic number, because the mean of its divisors is an integer number (32886504).

Almost surely, 2^164432505 is an apocalyptic number.

164432505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164432505 is a deficient number, since it is larger than the sum of its proper divisors (98659527).

164432505 is a wasteful number, since it uses less digits than its factorization.

164432505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10962175.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 164432505 is about 12823.1238393770. The cubic root of 164432505 is about 547.8511248224.

Adding to 164432505 its reverse (505234461), we get a palindrome (669666966).

The spelling of 164432505 in words is "one hundred sixty-four million, four hundred thirty-two thousand, five hundred five".