164685765 has 8 divisors (see below), whose sum is σ = 263497248. Its totient is φ = 87832400.

The previous prime is 164685761. The next prime is 164685767. The reversal of 164685765 is 567586461.

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

It is not a de Polignac number, because 164685765 - 2² = 164685761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164685761) 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, 5489511 + ... + 5489540.

It is an arithmetic number, because the mean of its divisors is an integer number (32937156).

Almost surely, 2^164685765 is an apocalyptic number.

164685765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164685765 is a deficient number, since it is larger than the sum of its proper divisors (98811483).

164685765 is a wasteful number, since it uses less digits than its factorization.

164685765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10979059.

The product of its digits is 1209600, while the sum is 48.

The square root of 164685765 is about 12832.9951687048. The cubic root of 164685765 is about 548.1322484823.

The spelling of 164685765 in words is "one hundred sixty-four million, six hundred eighty-five thousand, seven hundred sixty-five".