8516516605 has 8 divisors (see below), whose sum is σ = 10820985912. Its totient is φ = 6412435968.

The previous prime is 8516516573. The next prime is 8516516609. The reversal of 8516516605 is 5066156158.

It can be written as a sum of positive squares in 4 ways, for example, as 220403716 + 8296112889 = 14846^2 + 91083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8516516605 - 2⁵ = 8516516573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8516516609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50097072 + ... + 50097241.

It is an arithmetic number, because the mean of its divisors is an integer number (1352623239).

Almost surely, 2^8516516605 is an apocalyptic number.

8516516605 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8516516605 is a deficient number, since it is larger than the sum of its proper divisors (2304469307).

8516516605 is a wasteful number, since it uses less digits than its factorization.

8516516605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100194335.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 8516516605 is about 92284.9749688431. The cubic root of 8516516605 is about 2042.1485601100.

The spelling of 8516516605 in words is "eight billion, five hundred sixteen million, five hundred sixteen thousand, six hundred five".