12542421678 has 32 divisors (see below), whose sum is σ = 25166868480. Its totient is φ = 4167158400.

The previous prime is 12542421623. The next prime is 12542421733. The reversal of 12542421678 is 87612424521.

It is an interprime number because it is at equal distance from previous prime (12542421623) and next prime (12542421733).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3223158 + ... + 3227046.

It is an arithmetic number, because the mean of its divisors is an integer number (786464640).

Almost surely, 2^12542421678 is an apocalyptic number.

12542421678 is an abundant number, since it is smaller than the sum of its proper divisors (12624446802).

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

12542421678 is a wasteful number, since it uses less digits than its factorization.

12542421678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512.

The product of its digits is 215040, while the sum is 42.

The spelling of 12542421678 in words is "twelve billion, five hundred forty-two million, four hundred twenty-one thousand, six hundred seventy-eight".