12143887605 has 64 divisors (see below), whose sum is σ = 22366656000. Its totient is φ = 6244148736.

The previous prime is 12143887603. The next prime is 12143887649. The reversal of 12143887605 is 50678834121.

12143887605 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 38 + 8 + 7 + 605 = 666.

It is not a de Polignac number, because 12143887605 - 2¹ = 12143887603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143887603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3220161 + ... + 3223929.

It is an arithmetic number, because the mean of its divisors is an integer number (349479000).

Almost surely, 2^12143887605 is an apocalyptic number.

12143887605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12143887605 is a deficient number, since it is larger than the sum of its proper divisors (10222768395).

12143887605 is a wasteful number, since it uses less digits than its factorization.

12143887605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 12143887605 in words is "twelve billion, one hundred forty-three million, eight hundred eighty-seven thousand, six hundred five".