6480641888 has 48 divisors (see below), whose sum is σ = 14619709440. Its totient is φ = 2770129536.

The previous prime is 6480641819. The next prime is 6480641903. The reversal of 6480641888 is 8881460846.

It is a congruent number.

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, 48023 + ... + 123561.

It is an arithmetic number, because the mean of its divisors is an integer number (304577280).

Almost surely, 2^6480641888 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 6480641888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7309854720).

6480641888 is an abundant number, since it is smaller than the sum of its proper divisors (8139067552).

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

6480641888 is a wasteful number, since it uses less digits than its factorization.

6480641888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75939 (or 75931 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 53.

The square root of 6480641888 is about 80502.4340501578. The cubic root of 6480641888 is about 1864.4010600355.

The spelling of 6480641888 in words is "six billion, four hundred eighty million, six hundred forty-one thousand, eight hundred eighty-eight".