1272884405669 has 2 divisors, whose sum is σ = 1272884405670. Its totient is φ = 1272884405668.

The previous prime is 1272884405627. The next prime is 1272884405761. The reversal of 1272884405669 is 9665044882721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905209530625 + 367674875044 = 951425^2 + 606362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272884405669 - 2³² = 1268589438373 is a prime.

It is a super-2 number, since 2×1272884405669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272884401669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636442202834 + 636442202835.

It is an arithmetic number, because the mean of its divisors is an integer number (636442202835).

Almost surely, 2^{1272884405669} is an apocalyptic number.

It is an amenable number.

1272884405669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272884405669 is an equidigital number, since it uses as much as digits as its factorization.

1272884405669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 1272884405669 in words is "one trillion, two hundred seventy-two billion, eight hundred eighty-four million, four hundred five thousand, six hundred sixty-nine".