186851272649 has 2 divisors, whose sum is σ = 186851272650. Its totient is φ = 186851272648.

The previous prime is 186851272603. The next prime is 186851272651. The reversal of 186851272649 is 946272158681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182698114624 + 4153158025 = 427432^2 + 64445^2 .

It is a cyclic number.

It is not a de Polignac number, because 186851272649 - 2³⁶ = 118131795913 is a prime.

Together with 186851272651, 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 (186851272669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93425636324 + 93425636325.

It is an arithmetic number, because the mean of its divisors is an integer number (93425636325).

Almost surely, 2^186851272649 is an apocalyptic number.

It is an amenable number.

186851272649 is a deficient number, since it is larger than the sum of its proper divisors (1).

186851272649 is an equidigital number, since it uses as much as digits as its factorization.

186851272649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 59.

The spelling of 186851272649 in words is "one hundred eighty-six billion, eight hundred fifty-one million, two hundred seventy-two thousand, six hundred forty-nine".