189641406667 has 2 divisors, whose sum is σ = 189641406668. Its totient is φ = 189641406666.

The previous prime is 189641406649. The next prime is 189641406677. The reversal of 189641406667 is 766604146981.

It is a strong prime.

It is an emirp because it is prime and its reverse (766604146981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189641406667 - 2²⁷ = 189507188939 is a prime.

It is not a weakly prime, because it can be changed into another prime (189641406607) 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, 94820703333 + 94820703334.

It is an arithmetic number, because the mean of its divisors is an integer number (94820703334).

Almost surely, 2^189641406667 is an apocalyptic number.

189641406667 is a deficient number, since it is larger than the sum of its proper divisors (1).

189641406667 is an equidigital number, since it uses as much as digits as its factorization.

189641406667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 189641406667 in words is "one hundred eighty-nine billion, six hundred forty-one million, four hundred six thousand, six hundred sixty-seven".