1269452649469 has 2 divisors, whose sum is σ = 1269452649470. Its totient is φ = 1269452649468.

The previous prime is 1269452649467. The next prime is 1269452649541. The reversal of 1269452649469 is 9649462549621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236128146969 + 33324502500 = 1111813^2 + 182550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1269452649469 - 2¹ = 1269452649467 is a prime.

It is a super-2 number, since 2×1269452649469² (a number of 25 digits) contains 22 as substring.

Together with 1269452649467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1269452649467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634726324734 + 634726324735.

It is an arithmetic number, because the mean of its divisors is an integer number (634726324735).

Almost surely, 2^{1269452649469} is an apocalyptic number.

It is an amenable number.

1269452649469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269452649469 is an equidigital number, since it uses as much as digits as its factorization.

1269452649469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201553920, while the sum is 67.

The spelling of 1269452649469 in words is "one trillion, two hundred sixty-nine billion, four hundred fifty-two million, six hundred forty-nine thousand, four hundred sixty-nine".