6186198660849 has 9 divisors (see below), whose sum is σ = 8935631065803. Its totient is φ = 4124127466152.

The previous prime is 6186198660839. The next prime is 6186198660881. The reversal of 6186198660849 is 9480668916816.

The square root of 6186198660849 is 2487207.

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

6186198660849 is a `hidden beast` number, since 6 + 1 + 8 + 6 + 1 + 9 + 8 + 6 + 608 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2186278660449 + 3999920000400 = 1478607^2 + 1999980^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 6186198660849 - 2¹⁵ = 6186198628081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6186198660809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7047087 + ... + 7876155.

Almost surely, 2^{6186198660849} is an apocalyptic number.

6186198660849 is the 2487207-th square number.

6186198660849 is the 1243604-th centered octagonal number.

It is an amenable number.

6186198660849 is a deficient number, since it is larger than the sum of its proper divisors (2749432404954).

6186198660849 is an frugal number, since it uses more digits than its factorization.

6186198660849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658144 (or 829072 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 72.

The spelling of 6186198660849 in words is "six trillion, one hundred eighty-six billion, one hundred ninety-eight million, six hundred sixty thousand, eight hundred forty-nine".