6403763064 has 64 divisors (see below), whose sum is σ = 16605388800. Its totient is φ = 2055514496.

The previous prime is 6403763053. The next prime is 6403763081. The reversal of 6403763064 is 4603673046.

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, 254557 + ... + 278579.

It is an arithmetic number, because the mean of its divisors is an integer number (259459200).

Almost surely, 2^6403763064 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 6403763064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8302694400).

6403763064 is an abundant number, since it is smaller than the sum of its proper divisors (10201625736).

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

6403763064 is a wasteful number, since it uses less digits than its factorization.

6403763064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24444 (or 24440 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 39.

The square root of 6403763064 is about 80023.5156938259. The cubic root of 6403763064 is about 1856.9993495624. Note that the first 3 decimals are identical.

The spelling of 6403763064 in words is "six billion, four hundred three million, seven hundred sixty-three thousand, sixty-four".