1325555271617 has 2 divisors, whose sum is σ = 1325555271618. Its totient is φ = 1325555271616.

The previous prime is 1325555271563. The next prime is 1325555271647. The reversal of 1325555271617 is 7161725555231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1325298278656 + 256992961 = 1151216^2 + 16031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325555271617 - 2³⁰ = 1324481529793 is a prime.

It is a super-2 number, since 2×1325555271617² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1325555271647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662777635808 + 662777635809.

It is an arithmetic number, because the mean of its divisors is an integer number (662777635809).

Almost surely, 2^{1325555271617} is an apocalyptic number.

It is an amenable number.

1325555271617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1325555271617 is an equidigital number, since it uses as much as digits as its factorization.

1325555271617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2205000, while the sum is 50.

The spelling of 1325555271617 in words is "one trillion, three hundred twenty-five billion, five hundred fifty-five million, two hundred seventy-one thousand, six hundred seventeen".