19081259689 has 2 divisors, whose sum is σ = 19081259690. Its totient is φ = 19081259688.

The previous prime is 19081259671. The next prime is 19081259693. The reversal of 19081259689 is 98695218091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15129000000 + 3952259689 = 123000^2 + 62867^2 .

It is a cyclic number.

It is not a de Polignac number, because 19081259689 - 2²⁷ = 18947041961 is a prime.

It is not a weakly prime, because it can be changed into another prime (19081259189) 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, 9540629844 + 9540629845.

It is an arithmetic number, because the mean of its divisors is an integer number (9540629845).

Almost surely, 2^19081259689 is an apocalyptic number.

It is an amenable number.

19081259689 is a deficient number, since it is larger than the sum of its proper divisors (1).

19081259689 is an equidigital number, since it uses as much as digits as its factorization.

19081259689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 19081259689 in words is "nineteen billion, eighty-one million, two hundred fifty-nine thousand, six hundred eighty-nine".