6463561344 has 64 divisors (see below), whose sum is σ = 17182308000. Its totient is φ = 2152829952.

The previous prime is 6463561337. The next prime is 6463561373. The reversal of 6463561344 is 4431653646.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 6463561296 and 6463561305.

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, 542847 + ... + 554625.

Almost surely, 2^6463561344 is an apocalyptic number.

6463561344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6463561344 is an abundant number, since it is smaller than the sum of its proper divisors (10718746656).

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

6463561344 is a wasteful number, since it uses less digits than its factorization.

6463561344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13225 (or 13213 counting only the distinct ones).

The product of its digits is 622080, while the sum is 42.

The square root of 6463561344 is about 80396.2769287235. The cubic root of 6463561344 is about 1862.7616646856.

The spelling of 6463561344 in words is "six billion, four hundred sixty-three million, five hundred sixty-one thousand, three hundred forty-four".