265485686993 has 2 divisors, whose sum is σ = 265485686994. Its totient is φ = 265485686992.

The previous prime is 265485686987. The next prime is 265485687017. The reversal of 265485686993 is 399686584562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141069350464 + 124416336529 = 375592^2 + 352727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265485686993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265485686933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132742843496 + 132742843497.

It is an arithmetic number, because the mean of its divisors is an integer number (132742843497).

Almost surely, 2^265485686993 is an apocalyptic number.

It is an amenable number.

265485686993 is a deficient number, since it is larger than the sum of its proper divisors (1).

265485686993 is an equidigital number, since it uses as much as digits as its factorization.

265485686993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 671846400, while the sum is 71.

The spelling of 265485686993 in words is "two hundred sixty-five billion, four hundred eighty-five million, six hundred eighty-six thousand, nine hundred ninety-three".