263865897768 has 64 divisors (see below), whose sum is σ = 731831500800. Its totient is φ = 78604114880.

The previous prime is 263865897721. The next prime is 263865897773. The reversal of 263865897768 is 867798568362.

263865897768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 263865897768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8454696 + ... + 8485847.

It is an arithmetic number, because the mean of its divisors is an integer number (11434867200).

Almost surely, 2^263865897768 is an apocalyptic number.

It is an amenable number.

263865897768 is an abundant number, since it is smaller than the sum of its proper divisors (467965603032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263865897768 is a wasteful number, since it uses less digits than its factorization.

263865897768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940622 (or 16940618 counting only the distinct ones).

The product of its digits is 1463132160, while the sum is 75.

The spelling of 263865897768 in words is "two hundred sixty-three billion, eight hundred sixty-five million, eight hundred ninety-seven thousand, seven hundred sixty-eight".