189516108644323 has 2 divisors, whose sum is σ = 189516108644324. Its totient is φ = 189516108644322.

The previous prime is 189516108644279. The next prime is 189516108644431. The reversal of 189516108644323 is 323446801615981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189516108644323 is a prime.

It is not a weakly prime, because it can be changed into another prime (189516108645323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94758054322161 + 94758054322162.

It is an arithmetic number, because the mean of its divisors is an integer number (94758054322162).

Almost surely, 2^{189516108644323} is an apocalyptic number.

189516108644323 is a deficient number, since it is larger than the sum of its proper divisors (1).

189516108644323 is an equidigital number, since it uses as much as digits as its factorization.

189516108644323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 189516108644323 in words is "one hundred eighty-nine trillion, five hundred sixteen billion, one hundred eight million, six hundred forty-four thousand, three hundred twenty-three".