265491394249 has 2 divisors, whose sum is σ = 265491394250. Its totient is φ = 265491394248.

The previous prime is 265491394193. The next prime is 265491394271. The reversal of 265491394249 is 942493194562.

265491394249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139096923849 + 126394470400 = 372957^2 + 355520^2 .

It is a cyclic number.

It is not a de Polignac number, because 265491394249 - 2¹³ = 265491386057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265491394193 and 265491394202.

It is not a weakly prime, because it can be changed into another prime (265491394849) 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, 132745697124 + 132745697125.

It is an arithmetic number, because the mean of its divisors is an integer number (132745697125).

Almost surely, 2^265491394249 is an apocalyptic number.

It is an amenable number.

265491394249 is a deficient number, since it is larger than the sum of its proper divisors (1).

265491394249 is an equidigital number, since it uses as much as digits as its factorization.

265491394249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 58.

The spelling of 265491394249 in words is "two hundred sixty-five billion, four hundred ninety-one million, three hundred ninety-four thousand, two hundred forty-nine".