11812731636 has 12 divisors (see below), whose sum is σ = 27563040512. Its totient is φ = 3937577208.

The previous prime is 11812731631. The next prime is 11812731647. The reversal of 11812731636 is 63613721811.

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

It is a junction number, because it is equal to n+sod(n) for n = 11812731594 and 11812731603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812731631) 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, 492197140 + ... + 492197163.

Almost surely, 2^11812731636 is an apocalyptic number.

It is an amenable number.

11812731636 is an abundant number, since it is smaller than the sum of its proper divisors (15750308876).

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

11812731636 is a wasteful number, since it uses less digits than its factorization.

11812731636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984394310 (or 984394308 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The spelling of 11812731636 in words is "eleven billion, eight hundred twelve million, seven hundred thirty-one thousand, six hundred thirty-six".