6404799864 has 32 divisors (see below), whose sum is σ = 16214688000. Its totient is φ = 2107908192.

The previous prime is 6404799847. The next prime is 6404799899. The reversal of 6404799864 is 4689974046.

It is a super-2 number, since 2×6404799864² = 82042922595788836992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687134 + ... + 1690925.

It is an arithmetic number, because the mean of its divisors is an integer number (506709000).

Almost surely, 2^6404799864 is an apocalyptic number.

It is an amenable number.

6404799864 is an abundant number, since it is smaller than the sum of its proper divisors (9809888136).

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

6404799864 is a wasteful number, since it uses less digits than its factorization.

6404799864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378147 (or 3378143 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The square root of 6404799864 is about 80029.9935274270. The cubic root of 6404799864 is about 1857.0995631925.

The spelling of 6404799864 in words is "six billion, four hundred four million, seven hundred ninety-nine thousand, eight hundred sixty-four".