115563133261 has 4 divisors (see below), whose sum is σ = 118250648032. Its totient is φ = 112875618492.

The previous prime is 115563133199. The next prime is 115563133277. The reversal of 115563133261 is 162331365511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115563133261 - 2¹⁷ = 115563002189 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 115563133261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115563133291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343757321 + ... + 1343757406.

It is an arithmetic number, because the mean of its divisors is an integer number (29562662008).

Almost surely, 2^115563133261 is an apocalyptic number.

It is an amenable number.

115563133261 is a deficient number, since it is larger than the sum of its proper divisors (2687514771).

115563133261 is an equidigital number, since it uses as much as digits as its factorization.

115563133261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687514770.

The product of its digits is 48600, while the sum is 37.

Adding to 115563133261 its reverse (162331365511), we get a palindrome (277894498772).

The spelling of 115563133261 in words is "one hundred fifteen billion, five hundred sixty-three million, one hundred thirty-three thousand, two hundred sixty-one".