263553324563 has 8 divisors (see below), whose sum is σ = 279060962832. Its totient is φ = 248046186496.

The previous prime is 263553324511. The next prime is 263553324583. The reversal of 263553324563 is 365423355362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263553324563 - 2¹⁸ = 263553062419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263553324583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861856 + ... + 1998402.

It is an arithmetic number, because the mean of its divisors is an integer number (34882620354).

Almost surely, 2^263553324563 is an apocalyptic number.

263553324563 is a deficient number, since it is larger than the sum of its proper divisors (15507638269).

263553324563 is a wasteful number, since it uses less digits than its factorization.

263553324563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250101.

The product of its digits is 5832000, while the sum is 47.

The spelling of 263553324563 in words is "two hundred sixty-three billion, five hundred fifty-three million, three hundred twenty-four thousand, five hundred sixty-three".