164635507 has 4 divisors (see below), whose sum is σ = 164708176. Its totient is φ = 164562840.

The previous prime is 164635489. The next prime is 164635511. The reversal of 164635507 is 705536461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164635507 - 2¹¹ = 164633459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164635517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32823 + ... + 37504.

It is an arithmetic number, because the mean of its divisors is an integer number (41177044).

Almost surely, 2^164635507 is an apocalyptic number.

164635507 is a deficient number, since it is larger than the sum of its proper divisors (72669).

164635507 is an equidigital number, since it uses as much as digits as its factorization.

164635507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72668.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 164635507 is about 12831.0368637924. The cubic root of 164635507 is about 548.0764840323.

The spelling of 164635507 in words is "one hundred sixty-four million, six hundred thirty-five thousand, five hundred seven".