199140151891979 has 2 divisors, whose sum is σ = 199140151891980. Its totient is φ = 199140151891978.

The previous prime is 199140151891873. The next prime is 199140151891997. The reversal of 199140151891979 is 979198151041991.

Together with next prime (199140151891997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199140151891979 - 2²⁴ = 199140135114763 is a prime.

It is not a weakly prime, because it can be changed into another prime (199140151891679) 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, 99570075945989 + 99570075945990.

It is an arithmetic number, because the mean of its divisors is an integer number (99570075945990).

Almost surely, 2^{199140151891979} is an apocalyptic number.

199140151891979 is a deficient number, since it is larger than the sum of its proper divisors (1).

199140151891979 is an equidigital number, since it uses as much as digits as its factorization.

199140151891979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66134880, while the sum is 74.

The spelling of 199140151891979 in words is "one hundred ninety-nine trillion, one hundred forty billion, one hundred fifty-one million, eight hundred ninety-one thousand, nine hundred seventy-nine".