164849685 has 64 divisors (see below), whose sum is σ = 354170880. Its totient is φ = 63233280.

The previous prime is 164849677. The next prime is 164849687. The reversal of 164849685 is 586948461.

It is not a de Polignac number, because 164849685 - 2³ = 164849677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164849687) 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 63 ways as a sum of consecutive naturals, for example, 9526 + ... + 20504.

It is an arithmetic number, because the mean of its divisors is an integer number (5533920).

Almost surely, 2^164849685 is an apocalyptic number.

164849685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164849685 is an abundant number, since it is smaller than the sum of its proper divisors (189321195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164849685 is a wasteful number, since it uses less digits than its factorization.

164849685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11018.

The product of its digits is 1658880, while the sum is 51.

The square root of 164849685 is about 12839.3802420522. The cubic root of 164849685 is about 548.3140493480.

The spelling of 164849685 in words is "one hundred sixty-four million, eight hundred forty-nine thousand, six hundred eighty-five".