15728728585769 has 2 divisors, whose sum is σ = 15728728585770. Its totient is φ = 15728728585768.

The previous prime is 15728728585763. The next prime is 15728728585883. The reversal of 15728728585769 is 96758582782751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8185246614169 + 7543481971600 = 2860987^2 + 2746540^2 .

It is an emirp because it is prime and its reverse (96758582782751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15728728585769 - 2⁴ = 15728728585753 is a prime.

It is a super-2 number, since 2×15728728585769² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15728728585693 and 15728728585702.

It is not a weakly prime, because it can be changed into another prime (15728728585763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7864364292884 + 7864364292885.

It is an arithmetic number, because the mean of its divisors is an integer number (7864364292885).

Almost surely, 2^{15728728585769} is an apocalyptic number.

It is an amenable number.

15728728585769 is a deficient number, since it is larger than the sum of its proper divisors (1).

15728728585769 is an equidigital number, since it uses as much as digits as its factorization.

15728728585769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632000, while the sum is 80.

The spelling of 15728728585769 in words is "fifteen trillion, seven hundred twenty-eight billion, seven hundred twenty-eight million, five hundred eighty-five thousand, seven hundred sixty-nine".