8511918664 has 16 divisors (see below), whose sum is σ = 15967652220. Its totient is φ = 4253878080.

The previous prime is 8511918659. The next prime is 8511918719. The reversal of 8511918664 is 4668191158.

It can be written as a sum of positive squares in 2 ways, for example, as 8051472900 + 460445764 = 89730^2 + 21458^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242707 + ... + 275554.

Almost surely, 2^8511918664 is an apocalyptic number.

It is an amenable number.

8511918664 is a deficient number, since it is larger than the sum of its proper divisors (7455733556).

8511918664 is a wasteful number, since it uses less digits than its factorization.

8511918664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520320 (or 520316 counting only the distinct ones).

The product of its digits is 414720, while the sum is 49.

The square root of 8511918664 is about 92260.0599609604. The cubic root of 8511918664 is about 2041.7809853797.

The spelling of 8511918664 in words is "eight billion, five hundred eleven million, nine hundred eighteen thousand, six hundred sixty-four".