1264772793569 has 2 divisors, whose sum is σ = 1264772793570. Its totient is φ = 1264772793568.

The previous prime is 1264772793541. The next prime is 1264772793587. The reversal of 1264772793569 is 9653972774621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821403253969 + 443369539600 = 906313^2 + 665860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264772793569 - 2⁸ = 1264772793313 is a prime.

It is a super-2 number, since 2×1264772793569² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1264772793499 and 1264772793508.

It is not a weakly prime, because it can be changed into another prime (1264772793509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632386396784 + 632386396785.

It is an arithmetic number, because the mean of its divisors is an integer number (632386396785).

Almost surely, 2^{1264772793569} is an apocalyptic number.

It is an amenable number.

1264772793569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264772793569 is an equidigital number, since it uses as much as digits as its factorization.

1264772793569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240045120, while the sum is 68.

The spelling of 1264772793569 in words is "one trillion, two hundred sixty-four billion, seven hundred seventy-two million, seven hundred ninety-three thousand, five hundred sixty-nine".