11725643636 has 24 divisors (see below), whose sum is σ = 23553707520. Its totient is φ = 5003328672.

The previous prime is 11725643621. The next prime is 11725643647. The reversal of 11725643636 is 63634652711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907940 + ... + 920763.

It is an arithmetic number, because the mean of its divisors is an integer number (981404480).

Almost surely, 2^11725643636 is an apocalyptic number.

It is an amenable number.

11725643636 is an abundant number, since it is smaller than the sum of its proper divisors (11828063884).

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

11725643636 is a wasteful number, since it uses less digits than its factorization.

11725643636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828943 (or 1828941 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The spelling of 11725643636 in words is "eleven billion, seven hundred twenty-five million, six hundred forty-three thousand, six hundred thirty-six".