263306313563 has 4 divisors (see below), whose sum is σ = 269429716248. Its totient is φ = 257182910880.

The previous prime is 263306313559. The next prime is 263306313607. The reversal of 263306313563 is 365313603362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263306313563 - 2² = 263306313559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263306313563.

It is not an unprimeable number, because it can be changed into a prime (263306313553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3061701278 + ... + 3061701363.

It is an arithmetic number, because the mean of its divisors is an integer number (67357429062).

Almost surely, 2^263306313563 is an apocalyptic number.

263306313563 is a deficient number, since it is larger than the sum of its proper divisors (6123402685).

263306313563 is an equidigital number, since it uses as much as digits as its factorization.

263306313563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123402684.

The product of its (nonzero) digits is 524880, while the sum is 41.

The spelling of 263306313563 in words is "two hundred sixty-three billion, three hundred six million, three hundred thirteen thousand, five hundred sixty-three".