12878783538 has 8 divisors (see below), whose sum is σ = 25757567088. Its totient is φ = 4292927844.

The previous prime is 12878783531. The next prime is 12878783549. The reversal of 12878783538 is 83538787821.

It is a sphenic number, since it is the product of 3 distinct primes.

12878783538 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12878783531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073231956 + ... + 1073231967.

It is an arithmetic number, because the mean of its divisors is an integer number (3219695886).

Almost surely, 2^12878783538 is an apocalyptic number.

12878783538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12878783538 is a wasteful number, since it uses less digits than its factorization.

12878783538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146463928.

The product of its digits is 18063360, while the sum is 60.

The spelling of 12878783538 in words is "twelve billion, eight hundred seventy-eight million, seven hundred eighty-three thousand, five hundred thirty-eight".