2168396186851 has 2 divisors, whose sum is σ = 2168396186852. Its totient is φ = 2168396186850.

The previous prime is 2168396186809. The next prime is 2168396186893. The reversal of 2168396186851 is 1586816938612.

It is a balanced prime because it is at equal distance from previous prime (2168396186809) and next prime (2168396186893).

It is a cyclic number.

It is not a de Polignac number, because 2168396186851 - 2²³ = 2168387798243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168396183851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084198093425 + 1084198093426.

It is an arithmetic number, because the mean of its divisors is an integer number (1084198093426).

Almost surely, 2^{2168396186851} is an apocalyptic number.

2168396186851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168396186851 is an equidigital number, since it uses as much as digits as its factorization.

2168396186851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29859840, while the sum is 64.

The spelling of 2168396186851 in words is "two trillion, one hundred sixty-eight billion, three hundred ninety-six million, one hundred eighty-six thousand, eight hundred fifty-one".