186851345729 has 2 divisors, whose sum is σ = 186851345730. Its totient is φ = 186851345728.

The previous prime is 186851345687. The next prime is 186851345731. The reversal of 186851345729 is 927543158681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121192408129 + 65658937600 = 348127^2 + 256240^2 .

It is a cyclic number.

It is not a de Polignac number, because 186851345729 - 2²⁸ = 186582910273 is a prime.

Together with 186851345731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (186851345789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93425672864 + 93425672865.

It is an arithmetic number, because the mean of its divisors is an integer number (93425672865).

Almost surely, 2^186851345729 is an apocalyptic number.

It is an amenable number.

186851345729 is a deficient number, since it is larger than the sum of its proper divisors (1).

186851345729 is an equidigital number, since it uses as much as digits as its factorization.

186851345729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 59.

The spelling of 186851345729 in words is "one hundred eighty-six billion, eight hundred fifty-one million, three hundred forty-five thousand, seven hundred twenty-nine".