6515323488 has 144 divisors (see below), whose sum is σ = 19435066560. Its totient is φ = 2067959808.

The previous prime is 6515323487. The next prime is 6515323513. The reversal of 6515323488 is 8843235156.

6515323488 is a `hidden beast` number, since 6 + 5 + 1 + 532 + 34 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×6515323488² = 84898880306568972288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515323487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494328 + ... + 507336.

It is an arithmetic number, because the mean of its divisors is an integer number (134965740).

Almost surely, 2^6515323488 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 6515323488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9717533280).

6515323488 is an abundant number, since it is smaller than the sum of its proper divisors (12919743072).

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

6515323488 is a wasteful number, since it uses less digits than its factorization.

6515323488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13109 (or 13098 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 6515323488 is about 80717.5537785927. The cubic root of 6515323488 is about 1867.7209682459.

The spelling of 6515323488 in words is "six billion, five hundred fifteen million, three hundred twenty-three thousand, four hundred eighty-eight".