265615015305121 has 2 divisors, whose sum is σ = 265615015305122. Its totient is φ = 265615015305120.

The previous prime is 265615015305083. The next prime is 265615015305151. The reversal of 265615015305121 is 121503510516562.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246575415398400 + 19039599906721 = 15702720^2 + 4363439^2 .

It is a cyclic number.

It is not a de Polignac number, because 265615015305121 - 2¹⁹ = 265615014780833 is a prime.

It is not a weakly prime, because it can be changed into another prime (265615015305151) 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, 132807507652560 + 132807507652561.

It is an arithmetic number, because the mean of its divisors is an integer number (132807507652561).

Almost surely, 2^{265615015305121} is an apocalyptic number.

It is an amenable number.

265615015305121 is a deficient number, since it is larger than the sum of its proper divisors (1).

265615015305121 is an equidigital number, since it uses as much as digits as its factorization.

265615015305121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 265615015305121 in words is "two hundred sixty-five trillion, six hundred fifteen billion, fifteen million, three hundred five thousand, one hundred twenty-one".