19139597569 has 2 divisors, whose sum is σ = 19139597570. Its totient is φ = 19139597568.

The previous prime is 19139597557. The next prime is 19139597597. The reversal of 19139597569 is 96579593191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18329910544 + 809687025 = 135388^2 + 28455^2 .

It is a cyclic number.

It is not a de Polignac number, because 19139597569 - 2⁵ = 19139597537 is a prime.

It is a super-2 number, since 2×19139597569² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19139597569.

It is not a weakly prime, because it can be changed into another prime (19139597549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569798784 + 9569798785.

It is an arithmetic number, because the mean of its divisors is an integer number (9569798785).

Almost surely, 2^19139597569 is an apocalyptic number.

It is an amenable number.

19139597569 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139597569 is an equidigital number, since it uses as much as digits as its factorization.

19139597569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20667150, while the sum is 64.

The spelling of 19139597569 in words is "nineteen billion, one hundred thirty-nine million, five hundred ninety-seven thousand, five hundred sixty-nine".