6515913380 has 24 divisors (see below), whose sum is σ = 13718610360. Its totient is φ = 2599662080.

The previous prime is 6515913353. The next prime is 6515913389. The reversal of 6515913380 is 833195156.

It can be written as a sum of positive squares in 4 ways, for example, as 1113957376 + 5401956004 = 33376^2 + 73498^2 .

It is not an unprimeable number, because it can be changed into a prime (6515913389) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 410981 + ... + 426540.

It is an arithmetic number, because the mean of its divisors is an integer number (571608765).

Almost surely, 2^6515913380 is an apocalyptic number.

It is an amenable number.

6515913380 is an abundant number, since it is smaller than the sum of its proper divisors (7202696980).

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

6515913380 is a wasteful number, since it uses less digits than its factorization.

6515913380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837919 (or 837917 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 6515913380 is about 80721.2077461679. The cubic root of 6515913380 is about 1867.7773338487. Note that the first 3 decimals are identical.

The spelling of 6515913380 in words is "six billion, five hundred fifteen million, nine hundred thirteen thousand, three hundred eighty".