164685605 has 8 divisors (see below), whose sum is σ = 225854592. Its totient is φ = 112927248.

The previous prime is 164685601. The next prime is 164685611. The reversal of 164685605 is 506586461.

It is a happy number.

164685605 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 not a de Polignac number, because 164685605 - 2² = 164685601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164685601) 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, 2352617 + ... + 2352686.

It is an arithmetic number, because the mean of its divisors is an integer number (28231824).

Almost surely, 2^164685605 is an apocalyptic number.

It is an amenable number.

164685605 is a deficient number, since it is larger than the sum of its proper divisors (61168987).

164685605 is an equidigital number, since it uses as much as digits as its factorization.

164685605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705315.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 164685605 is about 12832.9889347728. The cubic root of 164685605 is about 548.1320709701.

The spelling of 164685605 in words is "one hundred sixty-four million, six hundred eighty-five thousand, six hundred five".