19045860445889 has 2 divisors, whose sum is σ = 19045860445890. Its totient is φ = 19045860445888.

The previous prime is 19045860445861. The next prime is 19045860445903. The reversal of 19045860445889 is 98854406854091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17266584574864 + 1779275871025 = 4155308^2 + 1333895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19045860445889 is a prime.

It is not a weakly prime, because it can be changed into another prime (19045860405889) 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, 9522930222944 + 9522930222945.

It is an arithmetic number, because the mean of its divisors is an integer number (9522930222945).

Almost surely, 2^{19045860445889} is an apocalyptic number.

It is an amenable number.

19045860445889 is a deficient number, since it is larger than the sum of its proper divisors (1).

19045860445889 is an equidigital number, since it uses as much as digits as its factorization.

19045860445889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 398131200, while the sum is 71.

The spelling of 19045860445889 in words is "nineteen trillion, forty-five billion, eight hundred sixty million, four hundred forty-five thousand, eight hundred eighty-nine".