1265922555173 has 2 divisors, whose sum is σ = 1265922555174. Its totient is φ = 1265922555172.

The previous prime is 1265922555133. The next prime is 1265922555199. The reversal of 1265922555173 is 3715552295621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860176486849 + 405746068324 = 927457^2 + 636982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265922555173 - 2⁶ = 1265922555109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265922555133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632961277586 + 632961277587.

It is an arithmetic number, because the mean of its divisors is an integer number (632961277587).

Almost surely, 2^{1265922555173} is an apocalyptic number.

It is an amenable number.

1265922555173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265922555173 is an equidigital number, since it uses as much as digits as its factorization.

1265922555173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670000, while the sum is 53.

The spelling of 1265922555173 in words is "one trillion, two hundred sixty-five billion, nine hundred twenty-two million, five hundred fifty-five thousand, one hundred seventy-three".