6463946880 has 256 divisors, whose sum is σ = 23684400000. Its totient is φ = 1664151552.

The previous prime is 6463946869. The next prime is 6463946893. The reversal of 6463946880 is 886493646.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494671 + ... + 507569.

Almost surely, 2^6463946880 is an apocalyptic number.

6463946880 is a gapful number since it is divisible by the number (60) 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 6463946880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11842200000).

6463946880 is an abundant number, since it is smaller than the sum of its proper divisors (17220453120).

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

6463946880 is a wasteful number, since it uses less digits than its factorization.

6463946880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956 (or 12938 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 6463946880 is about 80398.6746159413. The cubic root of 6463946880 is about 1862.7987003777.

The spelling of 6463946880 in words is "six billion, four hundred sixty-three million, nine hundred forty-six thousand, eight hundred eighty".