6464640000128 has 32 divisors (see below), whose sum is σ = 13636350004860. Its totient is φ = 3042183528448.

The previous prime is 6464640000101. The next prime is 6464640000149. The reversal of 6464640000128 is 8210000464646.

It can be written as a sum of positive squares in 2 ways, for example, as 6317742574144 + 146897425984 = 2513512^2 + 383272^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485439001 + ... + 1485443352.

Almost surely, 2^{6464640000128} is an apocalyptic number.

6464640000128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6464640000128 is an abundant number, since it is smaller than the sum of its proper divisors (7171710004732).

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

6464640000128 is a wasteful number, since it uses less digits than its factorization.

6464640000128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970882384 (or 2970882372 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 6464640000128 in words is "six trillion, four hundred sixty-four billion, six hundred forty million, one hundred twenty-eight", and thus it is an aban number.