12187557423 has 12 divisors (see below), whose sum is σ = 18369652080. Its totient is φ = 7771775616.

The previous prime is 12187557419. The next prime is 12187557439. The reversal of 12187557423 is 32475578121.

12187557423 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 75 + 574 + 2 + 3 = 666.

It is not a de Polignac number, because 12187557423 - 2² = 12187557419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187557443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29438338 + ... + 29438751.

It is an arithmetic number, because the mean of its divisors is an integer number (1530804340).

Almost surely, 2^12187557423 is an apocalyptic number.

12187557423 is a deficient number, since it is larger than the sum of its proper divisors (6182094657).

12187557423 is a wasteful number, since it uses less digits than its factorization.

12187557423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58877118 (or 58877115 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 12187557423 in words is "twelve billion, one hundred eighty-seven million, five hundred fifty-seven thousand, four hundred twenty-three".