191924018969729 has 2 divisors, whose sum is σ = 191924018969730. Its totient is φ = 191924018969728.

The previous prime is 191924018969693. The next prime is 191924018969789. The reversal of 191924018969729 is 927969810429191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165801084646129 + 26122934323600 = 12876377^2 + 5111060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191924018969729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191924018969729.

It is not a weakly prime, because it can be changed into another prime (191924018969789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95962009484864 + 95962009484865.

It is an arithmetic number, because the mean of its divisors is an integer number (95962009484865).

Almost surely, 2^{191924018969729} is an apocalyptic number.

It is an amenable number.

191924018969729 is a deficient number, since it is larger than the sum of its proper divisors (1).

191924018969729 is an equidigital number, since it uses as much as digits as its factorization.

191924018969729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317447424, while the sum is 77.

The spelling of 191924018969729 in words is "one hundred ninety-one trillion, nine hundred twenty-four billion, eighteen million, nine hundred sixty-nine thousand, seven hundred twenty-nine".