6405533328 has 20 divisors (see below), whose sum is σ = 16547627888. Its totient is φ = 2135177760.

The previous prime is 6405533293. The next prime is 6405533333. The reversal of 6405533328 is 8233355046.

It is a super-2 number, since 2×6405533328² = 82061714432237511168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66724258 + ... + 66724353.

Almost surely, 2^6405533328 is an apocalyptic number.

It is an amenable number.

6405533328 is an abundant number, since it is smaller than the sum of its proper divisors (10142094560).

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

6405533328 is a wasteful number, since it uses less digits than its factorization.

6405533328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133448622 (or 133448616 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The square root of 6405533328 is about 80034.5758282007. The cubic root of 6405533328 is about 1857.1704508450.

The spelling of 6405533328 in words is "six billion, four hundred five million, five hundred thirty-three thousand, three hundred twenty-eight".