186856243243 has 2 divisors, whose sum is σ = 186856243244. Its totient is φ = 186856243242.

The previous prime is 186856243229. The next prime is 186856243307. The reversal of 186856243243 is 342342658681.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186856243243 is a prime.

It is not a weakly prime, because it can be changed into another prime (186856243043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93428121621 + 93428121622.

It is an arithmetic number, because the mean of its divisors is an integer number (93428121622).

Almost surely, 2^186856243243 is an apocalyptic number.

186856243243 is a deficient number, since it is larger than the sum of its proper divisors (1).

186856243243 is an equidigital number, since it uses as much as digits as its factorization.

186856243243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 52.

The spelling of 186856243243 in words is "one hundred eighty-six billion, eight hundred fifty-six million, two hundred forty-three thousand, two hundred forty-three".