265328009857 has 2 divisors, whose sum is σ = 265328009858. Its totient is φ = 265328009856.

The previous prime is 265328009839. The next prime is 265328009861. The reversal of 265328009857 is 758900823562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255339206721 + 9988803136 = 505311^2 + 99944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265328009857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265328009798 and 265328009807.

It is not a weakly prime, because it can be changed into another prime (265328009897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132664004928 + 132664004929.

It is an arithmetic number, because the mean of its divisors is an integer number (132664004929).

Almost surely, 2^265328009857 is an apocalyptic number.

It is an amenable number.

265328009857 is a deficient number, since it is larger than the sum of its proper divisors (1).

265328009857 is an equidigital number, since it uses as much as digits as its factorization.

265328009857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 265328009857 in words is "two hundred sixty-five billion, three hundred twenty-eight million, nine thousand, eight hundred fifty-seven".