263881385423 has 2 divisors, whose sum is σ = 263881385424. Its totient is φ = 263881385422.

The previous prime is 263881385413. The next prime is 263881385431. The reversal of 263881385423 is 324583188362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263881385423 - 2¹⁸ = 263881123279 is a prime.

It is a super-3 number, since 3×263881385423³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263881385413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131940692711 + 131940692712.

It is an arithmetic number, because the mean of its divisors is an integer number (131940692712).

Almost surely, 2^263881385423 is an apocalyptic number.

263881385423 is a deficient number, since it is larger than the sum of its proper divisors (1).

263881385423 is an equidigital number, since it uses as much as digits as its factorization.

263881385423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 53.

The spelling of 263881385423 in words is "two hundred sixty-three billion, eight hundred eighty-one million, three hundred eighty-five thousand, four hundred twenty-three".