2185553215193 has 2 divisors, whose sum is σ = 2185553215194. Its totient is φ = 2185553215192.

The previous prime is 2185553215177. The next prime is 2185553215199. The reversal of 2185553215193 is 3915123555812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2074095389584 + 111457825609 = 1440172^2 + 333853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185553215193 - 2⁴ = 2185553215177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185553215199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092776607596 + 1092776607597.

It is an arithmetic number, because the mean of its divisors is an integer number (1092776607597).

Almost surely, 2^{2185553215193} is an apocalyptic number.

It is an amenable number.

2185553215193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185553215193 is an equidigital number, since it uses as much as digits as its factorization.

2185553215193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 50.

The spelling of 2185553215193 in words is "two trillion, one hundred eighty-five billion, five hundred fifty-three million, two hundred fifteen thousand, one hundred ninety-three".