5639394168 has 96 divisors (see below), whose sum is σ = 15559830000. Its totient is φ = 1844656128.

The previous prime is 5639394119. The next prime is 5639394239. The reversal of 5639394168 is 8614939365.

5639394168 is a `hidden beast` number, since 5 + 6 + 393 + 94 + 168 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3945678 + ... + 3947106.

Almost surely, 2^5639394168 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 5639394168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7779915000).

5639394168 is an abundant number, since it is smaller than the sum of its proper divisors (9920435832).

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

5639394168 is a wasteful number, since it uses less digits than its factorization.

5639394168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429 (or 2422 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 5639394168 is about 75095.8998081786. The cubic root of 5639394168 is about 1779.9623532837.

The spelling of 5639394168 in words is "five billion, six hundred thirty-nine million, three hundred ninety-four thousand, one hundred sixty-eight".