263231542205563 has 4 divisors (see below), whose sum is σ = 263239172361000. Its totient is φ = 263223912050128.

The previous prime is 263231542205537. The next prime is 263231542205659. The reversal of 263231542205563 is 365502245132362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263231542205563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263231542205063) 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, 3815025970 + ... + 3815094967.

It is an arithmetic number, because the mean of its divisors is an integer number (65809793090250).

Almost surely, 2^{263231542205563} is an apocalyptic number.

263231542205563 is a deficient number, since it is larger than the sum of its proper divisors (7630155437).

263231542205563 is an equidigital number, since it uses as much as digits as its factorization.

263231542205563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630155436.

The product of its (nonzero) digits is 7776000, while the sum is 49.

The spelling of 263231542205563 in words is "two hundred sixty-three trillion, two hundred thirty-one billion, five hundred forty-two million, two hundred five thousand, five hundred sixty-three".