1265539472653 has 2 divisors, whose sum is σ = 1265539472654. Its totient is φ = 1265539472652.

The previous prime is 1265539472633. The next prime is 1265539472699. The reversal of 1265539472653 is 3562749355621.

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., 922516067529 + 343023405124 = 960477^2 + 585682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265539472653 - 2²⁹ = 1265002601741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265539472623) 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, 632769736326 + 632769736327.

It is an arithmetic number, because the mean of its divisors is an integer number (632769736327).

Almost surely, 2^{1265539472653} is an apocalyptic number.

It is an amenable number.

1265539472653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265539472653 is an equidigital number, since it uses as much as digits as its factorization.

1265539472653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824000, while the sum is 58.

The spelling of 1265539472653 in words is "one trillion, two hundred sixty-five billion, five hundred thirty-nine million, four hundred seventy-two thousand, six hundred fifty-three".