1356439263265 has 4 divisors (see below), whose sum is σ = 1627727115924. Its totient is φ = 1085151410608.

The previous prime is 1356439263253. The next prime is 1356439263269. The reversal of 1356439263265 is 5623629346531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610275002401 + 746164260864 = 781201^2 + 863808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356439263265 - 2²³ = 1356430874657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356439263269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135643926322 + ... + 135643926331.

It is an arithmetic number, because the mean of its divisors is an integer number (406931778981).

Almost surely, 2^{1356439263265} is an apocalyptic number.

It is an amenable number.

1356439263265 is a deficient number, since it is larger than the sum of its proper divisors (271287852659).

1356439263265 is an equidigital number, since it uses as much as digits as its factorization.

1356439263265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271287852658.

The product of its digits is 20995200, while the sum is 55.

The spelling of 1356439263265 in words is "one trillion, three hundred fifty-six billion, four hundred thirty-nine million, two hundred sixty-three thousand, two hundred sixty-five".