12342811878 has 48 divisors (see below), whose sum is σ = 27035154432. Its totient is φ = 4069494000.

The previous prime is 12342811841. The next prime is 12342811909. The reversal of 12342811878 is 87811824321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724923 + ... + 741753.

It is an arithmetic number, because the mean of its divisors is an integer number (563232384).

Almost surely, 2^12342811878 is an apocalyptic number.

12342811878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12342811878 is an abundant number, since it is smaller than the sum of its proper divisors (14692342554).

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

12342811878 is a wasteful number, since it uses less digits than its factorization.

12342811878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17281 (or 17278 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The spelling of 12342811878 in words is "twelve billion, three hundred forty-two million, eight hundred eleven thousand, eight hundred seventy-eight".