6501321560 has 64 divisors (see below), whose sum is σ = 15513573600. Its totient is φ = 2443585536.

The previous prime is 6501321553. The next prime is 6501321571. The reversal of 6501321560 is 651231056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429806 + ... + 444674.

Almost surely, 2^6501321560 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 6501321560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7756786800).

6501321560 is an abundant number, since it is smaller than the sum of its proper divisors (9012252040).

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

6501321560 is a wasteful number, since it uses less digits than its factorization.

6501321560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15540 (or 15536 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 6501321560 is about 80630.7730336253. The cubic root of 6501321560 is about 1866.3820502850.

The spelling of 6501321560 in words is "six billion, five hundred one million, three hundred twenty-one thousand, five hundred sixty".