639068160 has 192 divisors, whose sum is σ = 2080391040. Its totient is φ = 167444480.

The previous prime is 639068153. The next prime is 639068161. The reversal of 639068160 is 61860936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×639068160² = 816816226251571200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (639068161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2180974 + ... + 2181266.

It is an arithmetic number, because the mean of its divisors is an integer number (10835370).

Almost surely, 2^639068160 is an apocalyptic number.

639068160 is a gapful number since it is divisible by the number (60) 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 639068160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040195520).

639068160 is an abundant number, since it is smaller than the sum of its proper divisors (1441322880).

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

639068160 is a wasteful number, since it uses less digits than its factorization.

639068160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 639068160 is about 25279.7974675431. The cubic root of 639068160 is about 861.3554252711.

The spelling of 639068160 in words is "six hundred thirty-nine million, sixty-eight thousand, one hundred sixty".