263801806399 has 2 divisors, whose sum is σ = 263801806400. Its totient is φ = 263801806398.

The previous prime is 263801806391. The next prime is 263801806427. The reversal of 263801806399 is 993608108362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263801806399 - 2³ = 263801806391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263801806391) 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, 131900903199 + 131900903200.

It is an arithmetic number, because the mean of its divisors is an integer number (131900903200).

Almost surely, 2^263801806399 is an apocalyptic number.

263801806399 is a deficient number, since it is larger than the sum of its proper divisors (1).

263801806399 is an equidigital number, since it uses as much as digits as its factorization.

263801806399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 263801806399 in words is "two hundred sixty-three billion, eight hundred one million, eight hundred six thousand, three hundred ninety-nine".