199888492651 has 2 divisors, whose sum is σ = 199888492652. Its totient is φ = 199888492650.

The previous prime is 199888492619. The next prime is 199888492703. The reversal of 199888492651 is 156294888991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199888492651 - 2⁵ = 199888492619 is a prime.

It is not a weakly prime, because it can be changed into another prime (199888492051) 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, 99944246325 + 99944246326.

It is an arithmetic number, because the mean of its divisors is an integer number (99944246326).

Almost surely, 2^199888492651 is an apocalyptic number.

199888492651 is a deficient number, since it is larger than the sum of its proper divisors (1).

199888492651 is an equidigital number, since it uses as much as digits as its factorization.

199888492651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89579520, while the sum is 70.

The spelling of 199888492651 in words is "one hundred ninety-nine billion, eight hundred eighty-eight million, four hundred ninety-two thousand, six hundred fifty-one".