5646438768 has 80 divisors (see below), whose sum is σ = 14862441600. Its totient is φ = 1846682880.

The previous prime is 5646438739. The next prime is 5646438799. The reversal of 5646438768 is 8678346465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1751398 + ... + 1754618.

It is an arithmetic number, because the mean of its divisors is an integer number (185780520).

Almost surely, 2^5646438768 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 5646438768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7431220800).

5646438768 is an abundant number, since it is smaller than the sum of its proper divisors (9216002832).

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

5646438768 is a wasteful number, since it uses less digits than its factorization.

5646438768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910 (or 3904 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 57.

The square root of 5646438768 is about 75142.7891949720. The cubic root of 5646438768 is about 1780.7032074042.

The spelling of 5646438768 in words is "five billion, six hundred forty-six million, four hundred thirty-eight thousand, seven hundred sixty-eight".