6516215272 has 16 divisors (see below), whose sum is σ = 13963318560. Its totient is φ = 2792663664.

The previous prime is 6516215263. The next prime is 6516215273. The reversal of 6516215272 is 2725126156.

It is a super-2 number, since 2×6516215272² = 84922122942092067968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6516215273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58180438 + ... + 58180549.

It is an arithmetic number, because the mean of its divisors is an integer number (872707410).

Almost surely, 2^6516215272 is an apocalyptic number.

It is an amenable number.

6516215272 is an abundant number, since it is smaller than the sum of its proper divisors (7447103288).

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

6516215272 is a wasteful number, since it uses less digits than its factorization.

6516215272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116361000 (or 116360996 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 6516215272 is about 80723.0776915747. The cubic root of 6516215272 is about 1867.8061790412.

The spelling of 6516215272 in words is "six billion, five hundred sixteen million, two hundred fifteen thousand, two hundred seventy-two".