11455121563 has 4 divisors (see below), whose sum is σ = 11455352800. Its totient is φ = 11454890328.

The previous prime is 11455121537. The next prime is 11455121567. The reversal of 11455121563 is 36512155411.

11455121563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-11455121563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11455121567) 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 3 ways as a sum of consecutive naturals, for example, 7788 + ... + 151561.

It is an arithmetic number, because the mean of its divisors is an integer number (2863838200).

Almost surely, 2^11455121563 is an apocalyptic number.

11455121563 is a deficient number, since it is larger than the sum of its proper divisors (231237).

11455121563 is an equidigital number, since it uses as much as digits as its factorization.

11455121563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231236.

The product of its digits is 18000, while the sum is 34.

Adding to 11455121563 its reverse (36512155411), we get a palindrome (47967276974).

The spelling of 11455121563 in words is "eleven billion, four hundred fifty-five million, one hundred twenty-one thousand, five hundred sixty-three".