2188385185391 has 2 divisors, whose sum is σ = 2188385185392. Its totient is φ = 2188385185390.

The previous prime is 2188385185367. The next prime is 2188385185409. The reversal of 2188385185391 is 1935815838812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2188385185391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188385185361) 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, 1094192592695 + 1094192592696.

It is an arithmetic number, because the mean of its divisors is an integer number (1094192592696).

Almost surely, 2^{2188385185391} is an apocalyptic number.

2188385185391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188385185391 is an equidigital number, since it uses as much as digits as its factorization.

2188385185391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16588800, while the sum is 62.

The spelling of 2188385185391 in words is "two trillion, one hundred eighty-eight billion, three hundred eighty-five million, one hundred eighty-five thousand, three hundred ninety-one".