8561516315 has 16 divisors (see below), whose sum is σ = 11233718496. Its totient is φ = 6212160000.

The previous prime is 8561516273. The next prime is 8561516323. The reversal of 8561516315 is 5136151658.

It is not a de Polignac number, because 8561516315 - 2²⁶ = 8494407451 is a prime.

It is a super-2 number, since 2×8561516315² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155936 + ... + 203565.

It is an arithmetic number, because the mean of its divisors is an integer number (702107406).

Almost surely, 2^8561516315 is an apocalyptic number.

8561516315 is a deficient number, since it is larger than the sum of its proper divisors (2672202181).

8561516315 is a wasteful number, since it uses less digits than its factorization.

8561516315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359950.

The product of its digits is 108000, while the sum is 41.

The square root of 8561516315 is about 92528.4621886693. The cubic root of 8561516315 is about 2045.7390230757.

The spelling of 8561516315 in words is "eight billion, five hundred sixty-one million, five hundred sixteen thousand, three hundred fifteen".