6816558609316 has 9 divisors (see below), whose sum is σ = 11928986704299. Its totient is φ = 3408276693804.

The previous prime is 6816558609257. The next prime is 6816558609323. The reversal of 6816558609316 is 6139068556186.

The square root of 6816558609316 is 2610854.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4568995 + ... + 5874421.

Almost surely, 2^{6816558609316} is an apocalyptic number.

6816558609316 is the 2610854-th square number.

It is an amenable number.

6816558609316 is a deficient number, since it is larger than the sum of its proper divisors (5112428094983).

6816558609316 is an frugal number, since it uses more digits than its factorization.

6816558609316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610858 (or 1305429 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 64.

Multiplying 6816558609316 by its sum of digits (64), we get a square (436259750996224 = 20886832²).

The spelling of 6816558609316 in words is "six trillion, eight hundred sixteen billion, five hundred fifty-eight million, six hundred nine thousand, three hundred sixteen".