164021264 has 40 divisors (see below), whose sum is σ = 354760032. Its totient is φ = 72817920.

The previous prime is 164021237. The next prime is 164021267. The reversal of 164021264 is 462120461.

It is a super-3 number, since 3×164021264³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164021267) 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, 3269 + ... + 18404.

Almost surely, 2^164021264 is an apocalyptic number.

It is an amenable number.

164021264 is an abundant number, since it is smaller than the sum of its proper divisors (190738768).

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

164021264 is a wasteful number, since it uses less digits than its factorization.

164021264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21735 (or 21729 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 164021264 is about 12807.0786676744. The cubic root of 164021264 is about 547.3940235377.

The spelling of 164021264 in words is "one hundred sixty-four million, twenty-one thousand, two hundred sixty-four".