164675840 has 72 divisors (see below), whose sum is σ = 450824640. Its totient is φ = 56457216.

The previous prime is 164675801. The next prime is 164675851. The reversal of 164675840 is 48576461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230 + ... + 18149.

Almost surely, 2^164675840 is an apocalyptic number.

164675840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164675840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225412320).

164675840 is an abundant number, since it is smaller than the sum of its proper divisors (286148800).

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

164675840 is an equidigital number, since it uses as much as digits as its factorization.

164675840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18407 (or 18393 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 164675840 is about 12832.6084643770. The cubic root of 164675840 is about 548.1212369622.

The spelling of 164675840 in words is "one hundred sixty-four million, six hundred seventy-five thousand, eight hundred forty".