112406646521 has 4 divisors (see below), whose sum is σ = 121053311652. Its totient is φ = 103759981392.

The previous prime is 112406646487. The next prime is 112406646551. The reversal of 112406646521 is 125646604211.

It is a happy number.

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 38794817296 + 73611829225 = 196964^2 + 271315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112406646521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (112406646551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4323332546 + ... + 4323332571.

It is an arithmetic number, because the mean of its divisors is an integer number (30263327913).

Almost surely, 2^112406646521 is an apocalyptic number.

It is an amenable number.

112406646521 is a deficient number, since it is larger than the sum of its proper divisors (8646665131).

112406646521 is an equidigital number, since it uses as much as digits as its factorization.

112406646521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646665130.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 112406646521 in words is "one hundred twelve billion, four hundred six million, six hundred forty-six thousand, five hundred twenty-one".