113555556889 has 4 divisors (see below), whose sum is σ = 116325204660. Its totient is φ = 110785909120.

The previous prime is 113555556887. The next prime is 113555556899. The reversal of 113555556889 is 988655555311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30867678864 + 82687878025 = 175692^2 + 287555^2 .

It is a cyclic number.

It is not a de Polignac number, because 113555556889 - 2¹ = 113555556887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (113555556887) 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, 1384823824 + ... + 1384823905.

It is an arithmetic number, because the mean of its divisors is an integer number (29081301165).

Almost surely, 2^113555556889 is an apocalyptic number.

It is an amenable number.

113555556889 is a deficient number, since it is larger than the sum of its proper divisors (2769647771).

113555556889 is an equidigital number, since it uses as much as digits as its factorization.

113555556889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769647770.

The product of its digits is 32400000, while the sum is 61.

The spelling of 113555556889 in words is "one hundred thirteen billion, five hundred fifty-five million, five hundred fifty-six thousand, eight hundred eighty-nine".