1270780489009 has 2 divisors, whose sum is σ = 1270780489010. Its totient is φ = 1270780489008.

The previous prime is 1270780489001. The next prime is 1270780489091. The reversal of 1270780489009 is 9009840870721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1247081425984 + 23699063025 = 1116728^2 + 153945^2 .

It is an emirp because it is prime and its reverse (9009840870721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1270780489009 - 2³ = 1270780489001 is a prime.

It is a super-2 number, since 2×1270780489009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1270780489001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635390244504 + 635390244505.

It is an arithmetic number, because the mean of its divisors is an integer number (635390244505).

Almost surely, 2^{1270780489009} is an apocalyptic number.

It is an amenable number.

1270780489009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270780489009 is an equidigital number, since it uses as much as digits as its factorization.

1270780489009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 1270780489009 in words is "one trillion, two hundred seventy billion, seven hundred eighty million, four hundred eighty-nine thousand, nine".