265243939157 has 2 divisors, whose sum is σ = 265243939158. Its totient is φ = 265243939156.

The previous prime is 265243939151. The next prime is 265243939171. The reversal of 265243939157 is 751939342562.

265243939157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194905473361 + 70338465796 = 441481^2 + 265214^2 .

It is a cyclic number.

It is not a de Polignac number, because 265243939157 - 2²² = 265239744853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265243939151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132621969578 + 132621969579.

It is an arithmetic number, because the mean of its divisors is an integer number (132621969579).

Almost surely, 2^265243939157 is an apocalyptic number.

It is an amenable number.

265243939157 is a deficient number, since it is larger than the sum of its proper divisors (1).

265243939157 is an equidigital number, since it uses as much as digits as its factorization.

265243939157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12247200, while the sum is 56.

The spelling of 265243939157 in words is "two hundred sixty-five billion, two hundred forty-three million, nine hundred thirty-nine thousand, one hundred fifty-seven".