6505499744128 has 64 divisors (see below), whose sum is σ = 16158140622720. Its totient is φ = 2534610286080.

The previous prime is 6505499744113. The next prime is 6505499744153. The reversal of 6505499744128 is 8214479945056.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 6505499744128.

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, 330017526 + ... + 330037237.

It is an arithmetic number, because the mean of its divisors is an integer number (252470947230).

Almost surely, 2^{6505499744128} is an apocalyptic number.

It is an amenable number.

6505499744128 is an abundant number, since it is smaller than the sum of its proper divisors (9652640878592).

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

6505499744128 is a wasteful number, since it uses less digits than its factorization.

6505499744128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660054795 (or 660054783 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 6505499744128 in words is "six trillion, five hundred five billion, four hundred ninety-nine million, seven hundred forty-four thousand, one hundred twenty-eight".