263881325291 has 2 divisors, whose sum is σ = 263881325292. Its totient is φ = 263881325290.

The previous prime is 263881325171. The next prime is 263881325299. The reversal of 263881325291 is 192523188362.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263881325291 - 2³⁴ = 246701456107 is a prime.

It is not a weakly prime, because it can be changed into another prime (263881325299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131940662645 + 131940662646.

It is an arithmetic number, because the mean of its divisors is an integer number (131940662646).

Almost surely, 2^263881325291 is an apocalyptic number.

263881325291 is a deficient number, since it is larger than the sum of its proper divisors (1).

263881325291 is an equidigital number, since it uses as much as digits as its factorization.

263881325291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The spelling of 263881325291 in words is "two hundred sixty-three billion, eight hundred eighty-one million, three hundred twenty-five thousand, two hundred ninety-one".