11726712636 has 12 divisors (see below), whose sum is σ = 27362329512. Its totient is φ = 3908904208.

The previous prime is 11726712631. The next prime is 11726712653. The reversal of 11726712636 is 63621762711.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11726712631) 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, 488613015 + ... + 488613038.

It is an arithmetic number, because the mean of its divisors is an integer number (2280194126).

Almost surely, 2^11726712636 is an apocalyptic number.

It is an amenable number.

11726712636 is an abundant number, since it is smaller than the sum of its proper divisors (15635616876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11726712636 is a wasteful number, since it uses less digits than its factorization.

11726712636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977226060 (or 977226058 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The spelling of 11726712636 in words is "eleven billion, seven hundred twenty-six million, seven hundred twelve thousand, six hundred thirty-six".