164649918 has 8 divisors (see below), whose sum is σ = 329299848. Its totient is φ = 54883304.

The previous prime is 164649899. The next prime is 164649937. The reversal of 164649918 is 819946461.

It is an interprime number because it is at equal distance from previous prime (164649899) and next prime (164649937).

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

164649918 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13720821 + ... + 13720832.

It is an arithmetic number, because the mean of its divisors is an integer number (41162481).

Almost surely, 2^164649918 is an apocalyptic number.

164649918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

164649918 is a wasteful number, since it uses less digits than its factorization.

164649918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27441658.

The product of its digits is 373248, while the sum is 48.

The square root of 164649918 is about 12831.5984195267. The cubic root of 164649918 is about 548.0924751144.

The spelling of 164649918 in words is "one hundred sixty-four million, six hundred forty-nine thousand, nine hundred eighteen".