164539965 has 16 divisors (see below), whose sum is σ = 263583936. Its totient is φ = 87648000.

The previous prime is 164539961. The next prime is 164539979. The reversal of 164539965 is 569935461.

It is a happy number.

It is not a de Polignac number, because 164539965 - 2² = 164539961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164539961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6990 + ... + 19440.

It is an arithmetic number, because the mean of its divisors is an integer number (16473996).

Almost surely, 2^164539965 is an apocalyptic number.

164539965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164539965 is a deficient number, since it is larger than the sum of its proper divisors (99043971).

164539965 is a wasteful number, since it uses less digits than its factorization.

164539965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340.

The product of its digits is 874800, while the sum is 48.

The square root of 164539965 is about 12827.3132416730. The cubic root of 164539965 is about 547.9704427999.

The spelling of 164539965 in words is "one hundred sixty-four million, five hundred thirty-nine thousand, nine hundred sixty-five".