6390694464 has 336 divisors, whose sum is σ = 22050573120. Its totient is φ = 1614090240.

The previous prime is 6390694447. The next prime is 6390694487. The reversal of 6390694464 is 4644960936.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3828222 + ... + 3829890.

Almost surely, 2^6390694464 is an apocalyptic number.

6390694464 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 6390694464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11025286560).

6390694464 is an abundant number, since it is smaller than the sum of its proper divisors (15659878656).

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

6390694464 is a wasteful number, since it uses less digits than its factorization.

6390694464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1729 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 51.

The square root of 6390694464 is about 79941.8192437475. The cubic root of 6390694464 is about 1855.7352538051.

The spelling of 6390694464 in words is "six billion, three hundred ninety million, six hundred ninety-four thousand, four hundred sixty-four".