6515665156 has 96 divisors (see below), whose sum is σ = 15396756480. Its totient is φ = 2329948800.

The previous prime is 6515665141. The next prime is 6515665181.

6515665156 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6515665156² = 84907784850225008672, which contains 22 as substring.

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, 712171 + ... + 721261.

It is an arithmetic number, because the mean of its divisors is an integer number (160382880).

Almost surely, 2^6515665156 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 6515665156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7698378240).

6515665156 is an abundant number, since it is smaller than the sum of its proper divisors (8881091324).

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

6515665156 is a wasteful number, since it uses less digits than its factorization.

6515665156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9305 (or 9303 counting only the distinct ones).

The product of its digits is 810000, while the sum is 46.

The square root of 6515665156 is about 80719.6701925869. The cubic root of 6515665156 is about 1867.7536158617.

The spelling of 6515665156 in words is "six billion, five hundred fifteen million, six hundred sixty-five thousand, one hundred fifty-six".