12558537742 has 4 divisors (see below), whose sum is σ = 18837806616. Its totient is φ = 6279268870.

The previous prime is 12558537727. The next prime is 12558537767. The reversal of 12558537742 is 24773585521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24773585521 = 467 ⋅53048363.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3139634434 + ... + 3139634437.

It is an arithmetic number, because the mean of its divisors is an integer number (4709451654).

Almost surely, 2^12558537742 is an apocalyptic number.

12558537742 is a deficient number, since it is larger than the sum of its proper divisors (6279268874).

12558537742 is an equidigital number, since it uses as much as digits as its factorization.

12558537742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6279268873.

The product of its digits is 2352000, while the sum is 49.

The spelling of 12558537742 in words is "twelve billion, five hundred fifty-eight million, five hundred thirty-seven thousand, seven hundred forty-two".