113316326561 has 4 divisors (see below), whose sum is σ = 118243123392. Its totient is φ = 108389529732.

The previous prime is 113316326509. The next prime is 113316326579. The reversal of 113316326561 is 165623613311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165623613311 = 13 ⋅12740277947.

It is a cyclic number.

It is not a de Polignac number, because 113316326561 - 2¹⁰ = 113316325537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113316328561) 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, 2463398381 + ... + 2463398426.

It is an arithmetic number, because the mean of its divisors is an integer number (29560780848).

Almost surely, 2^113316326561 is an apocalyptic number.

It is an amenable number.

113316326561 is a deficient number, since it is larger than the sum of its proper divisors (4926796831).

113316326561 is an equidigital number, since it uses as much as digits as its factorization.

113316326561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926796830.

The product of its digits is 58320, while the sum is 38.

Adding to 113316326561 its reverse (165623613311), we get a palindrome (278939939872).

The spelling of 113316326561 in words is "one hundred thirteen billion, three hundred sixteen million, three hundred twenty-six thousand, five hundred sixty-one".