265250277491 has 2 divisors, whose sum is σ = 265250277492. Its totient is φ = 265250277490.

The previous prime is 265250277463. The next prime is 265250277527. The reversal of 265250277491 is 194772052562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265250277491 - 2³⁴ = 248070408307 is a prime.

It is not a weakly prime, because it can be changed into another prime (265250277421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132625138745 + 132625138746.

It is an arithmetic number, because the mean of its divisors is an integer number (132625138746).

Almost surely, 2^265250277491 is an apocalyptic number.

265250277491 is a deficient number, since it is larger than the sum of its proper divisors (1).

265250277491 is an equidigital number, since it uses as much as digits as its factorization.

265250277491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 265250277491 in words is "two hundred sixty-five billion, two hundred fifty million, two hundred seventy-seven thousand, four hundred ninety-one".