12858779100 has 72 divisors (see below), whose sum is σ = 37216211760. Its totient is φ = 3427950080.

The previous prime is 12858779071. The next prime is 12858779111. The reversal of 12858779100 is 197785821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12858779100.

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, 1704136 + ... + 1711664.

It is an arithmetic number, because the mean of its divisors is an integer number (516891830).

Almost surely, 2^12858779100 is an apocalyptic number.

12858779100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12858779100 is an abundant number, since it is smaller than the sum of its proper divisors (24357432660).

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

12858779100 is a wasteful number, since it uses less digits than its factorization.

12858779100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13239 (or 13232 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 48.

The spelling of 12858779100 in words is "twelve billion, eight hundred fifty-eight million, seven hundred seventy-nine thousand, one hundred".