19044164257 has 2 divisors, whose sum is σ = 19044164258. Its totient is φ = 19044164256.

The previous prime is 19044164221. The next prime is 19044164339. The reversal of 19044164257 is 75246144091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12525862561 + 6518301696 = 111919^2 + 80736^2 .

It is an emirp because it is prime and its reverse (75246144091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19044164257 - 2⁷ = 19044164129 is a prime.

It is not a weakly prime, because it can be changed into another prime (19044162257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9522082128 + 9522082129.

It is an arithmetic number, because the mean of its divisors is an integer number (9522082129).

Almost surely, 2^19044164257 is an apocalyptic number.

It is an amenable number.

19044164257 is a deficient number, since it is larger than the sum of its proper divisors (1).

19044164257 is an equidigital number, since it uses as much as digits as its factorization.

19044164257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 19044164257 in words is "nineteen billion, forty-four million, one hundred sixty-four thousand, two hundred fifty-seven".