19144319769 has 27 divisors (see below), whose sum is σ = 29386064253. Its totient is φ = 12007694592.

The previous prime is 19144319729. The next prime is 19144319773. The reversal of 19144319769 is 96791344191.

The square root of 19144319769 is 138363.

It is a perfect power (a square), and thus also a powerful number.

19144319769 is a `hidden beast` number, since 1 + 9 + 1 + 443 + 197 + 6 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12947481369 + 6196838400 = 113787^2 + 78720^2 .

It is not a de Polignac number, because 19144319769 - 2¹³ = 19144311577 is a prime.

It is a super-2 number, since 2×19144319769² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19144319729) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7055157 + ... + 7057869.

Almost surely, 2^19144319769 is an apocalyptic number.

19144319769 is the 138363-rd square number.

19144319769 is the 69182-nd centered octagonal number.

It is an amenable number.

19144319769 is a deficient number, since it is larger than the sum of its proper divisors (10241744484).

19144319769 is an frugal number, since it uses more digits than its factorization.

19144319769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466 (or 2733 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The spelling of 19144319769 in words is "nineteen billion, one hundred forty-four million, three hundred nineteen thousand, seven hundred sixty-nine".