12566742134 has 4 divisors (see below), whose sum is σ = 18850113204. Its totient is φ = 6283371066.

The previous prime is 12566742127. The next prime is 12566742137. The reversal of 12566742134 is 43124766521.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 12566742091 and 12566742100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566742137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3141685532 + ... + 3141685535.

It is an arithmetic number, because the mean of its divisors is an integer number (4712528301).

Almost surely, 2^12566742134 is an apocalyptic number.

12566742134 is a deficient number, since it is larger than the sum of its proper divisors (6283371070).

12566742134 is an equidigital number, since it uses as much as digits as its factorization.

12566742134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283371069.

The product of its digits is 241920, while the sum is 41.

The spelling of 12566742134 in words is "twelve billion, five hundred sixty-six million, seven hundred forty-two thousand, one hundred thirty-four".