6515989632 has 96 divisors (see below), whose sum is σ = 18767209500. Its totient is φ = 2170054656.

The previous prime is 6515989607. The next prime is 6515989633. The reversal of 6515989632 is 2369895156.

It is a happy number.

6515989632 is a `hidden beast` number, since 6 + 515 + 9 + 8 + 96 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5857759296 + 658230336 = 76536^2 + 25656^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (6515989633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1920994 + ... + 1924382.

Almost surely, 2^6515989632 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 6515989632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9383604750).

6515989632 is an abundant number, since it is smaller than the sum of its proper divisors (12251219868).

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

6515989632 is a wasteful number, since it uses less digits than its factorization.

6515989632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078 (or 5063 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 6515989632 is about 80721.6800618025. The cubic root of 6515989632 is about 1867.7846196629.

The spelling of 6515989632 in words is "six billion, five hundred fifteen million, nine hundred eighty-nine thousand, six hundred thirty-two".