11331261162563 has 4 divisors (see below), whose sum is σ = 11351387737128. Its totient is φ = 11311134588000.

The previous prime is 11331261162547. The next prime is 11331261162589. The reversal of 11331261162563 is 36526116213311.

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 11331261162563 - 2⁴ = 11331261162547 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 11331261162563.

It is not an unprimeable number, because it can be changed into a prime (11331261162593) 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, 10063286438 + ... + 10063287563.

It is an arithmetic number, because the mean of its divisors is an integer number (2837846934282).

Almost surely, 2^{11331261162563} is an apocalyptic number.

11331261162563 is a deficient number, since it is larger than the sum of its proper divisors (20126574565).

11331261162563 is an equidigital number, since it uses as much as digits as its factorization.

11331261162563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20126574564.

The product of its digits is 116640, while the sum is 41.

Adding to 11331261162563 its reverse (36526116213311), we get a palindrome (47857377375874).

The spelling of 11331261162563 in words is "eleven trillion, three hundred thirty-one billion, two hundred sixty-one million, one hundred sixty-two thousand, five hundred sixty-three".