12451558842 has 64 divisors (see below), whose sum is σ = 28919721600. Its totient is φ = 3966036480.

The previous prime is 12451558817. The next prime is 12451558843. The reversal of 12451558842 is 24885515421.

12451558842 is a `hidden beast` number, since 1 + 2 + 4 + 51 + 558 + 8 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (12451558843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110917 + ... + 192887.

It is an arithmetic number, because the mean of its divisors is an integer number (451870650).

Almost surely, 2^12451558842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12451558842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14459860800).

12451558842 is an abundant number, since it is smaller than the sum of its proper divisors (16468162758).

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

12451558842 is a wasteful number, since it uses less digits than its factorization.

12451558842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82108 (or 82102 counting only the distinct ones).

The product of its digits is 512000, while the sum is 45.

The spelling of 12451558842 in words is "twelve billion, four hundred fifty-one million, five hundred fifty-eight thousand, eight hundred forty-two".