263881256363 has 16 divisors (see below), whose sum is σ = 281627477280. Its totient is φ = 246522092544.

The previous prime is 263881256333. The next prime is 263881256389. The reversal of 263881256363 is 363652188362.

It is not a de Polignac number, because 263881256363 - 2⁶ = 263881256299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263881256333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9074495 + ... + 9103527.

It is an arithmetic number, because the mean of its divisors is an integer number (17601717330).

Almost surely, 2^263881256363 is an apocalyptic number.

263881256363 is a deficient number, since it is larger than the sum of its proper divisors (17746220917).

263881256363 is a wasteful number, since it uses less digits than its factorization.

263881256363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35678.

The product of its digits is 7464960, while the sum is 53.

The spelling of 263881256363 in words is "two hundred sixty-three billion, eight hundred eighty-one million, two hundred fifty-six thousand, three hundred sixty-three".