6404685824 has 60 divisors (see below), whose sum is σ = 12858557208. Its totient is φ = 3189964800.

The previous prime is 6404685811. The next prime is 6404685887. The reversal of 6404685824 is 4285864046.

It is a congruent number.

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, 5422514 + ... + 5423694.

Almost surely, 2^6404685824 is an apocalyptic number.

6404685824 is a gapful number since it is divisible by the number (64) 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 6404685824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6429278604).

6404685824 is an abundant number, since it is smaller than the sum of its proper divisors (6453871384).

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

6404685824 is an equidigital number, since it uses as much as digits as its factorization.

6404685824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 47.

The square root of 6404685824 is about 80029.2810413788. The cubic root of 6404685824 is about 1857.0885409958.

The spelling of 6404685824 in words is "six billion, four hundred four million, six hundred eighty-five thousand, eight hundred twenty-four".