265203661621127 has 2 divisors, whose sum is σ = 265203661621128. Its totient is φ = 265203661621126.

The previous prime is 265203661621027. The next prime is 265203661621153. The reversal of 265203661621127 is 721126166302562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265203661621127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265203661621027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132601830810563 + 132601830810564.

It is an arithmetic number, because the mean of its divisors is an integer number (132601830810564).

Almost surely, 2^{265203661621127} is an apocalyptic number.

265203661621127 is a deficient number, since it is larger than the sum of its proper divisors (1).

265203661621127 is an equidigital number, since it uses as much as digits as its factorization.

265203661621127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 265203661621127 in words is "two hundred sixty-five trillion, two hundred three billion, six hundred sixty-one million, six hundred twenty-one thousand, one hundred twenty-seven".