12187705836988 has 72 divisors (see below), whose sum is σ = 24926613364800. Its totient is φ = 5192175098880.

The previous prime is 12187705836941. The next prime is 12187705837093. The reversal of 12187705836988 is 88963850778121.

12187705836988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12187705836988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1132353 + ... + 5065336.

It is an arithmetic number, because the mean of its divisors is an integer number (346202963400).

Almost surely, 2^{12187705836988} is an apocalyptic number.

It is an amenable number.

12187705836988 is an abundant number, since it is smaller than the sum of its proper divisors (12738907527812).

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

12187705836988 is a wasteful number, since it uses less digits than its factorization.

12187705836988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6197971 (or 6197958 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 73.

The spelling of 12187705836988 in words is "twelve trillion, one hundred eighty-seven billion, seven hundred five million, eight hundred thirty-six thousand, nine hundred eighty-eight".