64164492 has 72 divisors (see below), whose sum is σ = 187273632. Its totient is φ = 18144000.

The previous prime is 64164491. The next prime is 64164509. The reversal of 64164492 is 29446146.

64164492 is a `hidden beast` number, since 6 + 4 + 1 + 644 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64164491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24192 + ... + 26712.

Almost surely, 2^64164492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64164492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93636816).

64164492 is an abundant number, since it is smaller than the sum of its proper divisors (123109140).

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

64164492 is a wasteful number, since it uses less digits than its factorization.

64164492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639 (or 2634 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 64164492 is about 8010.2741526118. The cubic root of 64164492 is about 400.3423984912.

The spelling of 64164492 in words is "sixty-four million, one hundred sixty-four thousand, four hundred ninety-two".