6463646955 has 24 divisors (see below), whose sum is σ = 11793322320. Its totient is φ = 3265842240.

The previous prime is 6463646947. The next prime is 6463646963. The reversal of 6463646955 is 5596463646.

It is an interprime number because it is at equal distance from previous prime (6463646947) and next prime (6463646963).

It is not a de Polignac number, because 6463646955 - 2³ = 6463646947 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3779056 + ... + 3780765.

It is an arithmetic number, because the mean of its divisors is an integer number (491388430).

Almost surely, 2^6463646955 is an apocalyptic number.

6463646955 is a deficient number, since it is larger than the sum of its proper divisors (5329675365).

6463646955 is a wasteful number, since it uses less digits than its factorization.

6463646955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559851 (or 7559848 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 54.

The square root of 6463646955 is about 80396.8093583321. The cubic root of 6463646955 is about 1862.7698888506.

The spelling of 6463646955 in words is "six billion, four hundred sixty-three million, six hundred forty-six thousand, nine hundred fifty-five".