19144013988469 has 2 divisors, whose sum is σ = 19144013988470. Its totient is φ = 19144013988468.

The previous prime is 19144013988433. The next prime is 19144013988499. The reversal of 19144013988469 is 96488931044191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18332843565969 + 811170422500 = 4281687^2 + 900650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19144013988469 is a prime.

It is a super-2 number, since 2×19144013988469² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19144013988499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9572006994234 + 9572006994235.

It is an arithmetic number, because the mean of its divisors is an integer number (9572006994235).

Almost surely, 2^{19144013988469} is an apocalyptic number.

It is an amenable number.

19144013988469 is a deficient number, since it is larger than the sum of its proper divisors (1).

19144013988469 is an equidigital number, since it uses as much as digits as its factorization.

19144013988469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53747712, while the sum is 67.

The spelling of 19144013988469 in words is "nineteen trillion, one hundred forty-four billion, thirteen million, nine hundred eighty-eight thousand, four hundred sixty-nine".