6515065856 has 88 divisors (see below), whose sum is σ = 14851148760. Its totient is φ = 2829975552.

The previous prime is 6515065849. The next prime is 6515065871. The reversal of 6515065856 is 6585605156.

It can be written as a sum of positive squares in 4 ways, for example, as 1838694400 + 4676371456 = 42880^2 + 68384^2 .

It is a super-3 number, since 3×6515065856³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6515065856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211910 + ... + 240698.

Almost surely, 2^6515065856 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 6515065856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7425574380).

6515065856 is an abundant number, since it is smaller than the sum of its proper divisors (8336082904).

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

6515065856 is a wasteful number, since it uses less digits than its factorization.

6515065856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28839 (or 28821 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 47.

The square root of 6515065856 is about 80715.9578769899. The cubic root of 6515065856 is about 1867.6963498197.

The spelling of 6515065856 in words is "six billion, five hundred fifteen million, sixty-five thousand, eight hundred fifty-six".