6515970538 has 64 divisors (see below), whose sum is σ = 12709380096. Its totient is φ = 2431296000.

The previous prime is 6515970509. The next prime is 6515970619. The reversal of 6515970538 is 8350795156.

It is a junction number, because it is equal to n+sod(n) for n = 6515970491 and 6515970500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456043 + ... + 470113.

It is an arithmetic number, because the mean of its divisors is an integer number (198584064).

Almost surely, 2^6515970538 is an apocalyptic number.

6515970538 is a deficient number, since it is larger than the sum of its proper divisors (6193409558).

6515970538 is a wasteful number, since it uses less digits than its factorization.

6515970538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14219.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The square root of 6515970538 is about 80721.5617911348. The cubic root of 6515970538 is about 1867.7827952527.

The spelling of 6515970538 in words is "six billion, five hundred fifteen million, nine hundred seventy thousand, five hundred thirty-eight".