6505151664 has 120 divisors (see below), whose sum is σ = 18598028400. Its totient is φ = 1957767680.

The previous prime is 6505151603. The next prime is 6505151669. The reversal of 6505151664 is 4661515056.

It is not an unprimeable number, because it can be changed into a prime (6505151669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 861634 + ... + 869150.

It is an arithmetic number, because the mean of its divisors is an integer number (154983570).

Almost surely, 2^6505151664 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 6505151664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9299014200).

6505151664 is an abundant number, since it is smaller than the sum of its proper divisors (12092876736).

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

6505151664 is a wasteful number, since it uses less digits than its factorization.

6505151664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7699 (or 7682 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 6505151664 is about 80654.5204188829. The cubic root of 6505151664 is about 1866.7484903475.

The spelling of 6505151664 in words is "six billion, five hundred five million, one hundred fifty-one thousand, six hundred sixty-four".