1255075575517 has 2 divisors, whose sum is σ = 1255075575518. Its totient is φ = 1255075575516.

The previous prime is 1255075575473. The next prime is 1255075575553. The reversal of 1255075575517 is 7155755705521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244755250596 + 10320324921 = 1115686^2 + 101589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255075575517 - 2¹⁹ = 1255075051229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255075575217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627537787758 + 627537787759.

It is an arithmetic number, because the mean of its divisors is an integer number (627537787759).

Almost surely, 2^{1255075575517} is an apocalyptic number.

It is an amenable number.

1255075575517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255075575517 is an equidigital number, since it uses as much as digits as its factorization.

1255075575517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10718750, while the sum is 55.

The spelling of 1255075575517 in words is "one trillion, two hundred fifty-five billion, seventy-five million, five hundred seventy-five thousand, five hundred seventeen".