1272416927689 has 2 divisors, whose sum is σ = 1272416927690. Its totient is φ = 1272416927688.

The previous prime is 1272416927671. The next prime is 1272416927759. The reversal of 1272416927689 is 9867296142721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269903610000 + 2513317689 = 1126900^2 + 50133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272416927689 - 2²³ = 1272408539081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1272416927689.

It is not a weakly prime, because it can be changed into another prime (1272416927489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636208463844 + 636208463845.

It is an arithmetic number, because the mean of its divisors is an integer number (636208463845).

Almost surely, 2^{1272416927689} is an apocalyptic number.

It is an amenable number.

1272416927689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272416927689 is an equidigital number, since it uses as much as digits as its factorization.

1272416927689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 64.

The spelling of 1272416927689 in words is "one trillion, two hundred seventy-two billion, four hundred sixteen million, nine hundred twenty-seven thousand, six hundred eighty-nine".