12855344850 has 72 divisors (see below), whose sum is σ = 34563554532. Its totient is φ = 3425558400.

The previous prime is 12855344753. The next prime is 12855344863. The reversal of 12855344850 is 5844355821.

12855344850 is a `hidden beast` number, since 1 + 2 + 8 + 553 + 4 + 48 + 50 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8931951081 + 3923393769 = 94509^2 + 62637^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12855344796 and 12855344805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 644020 + ... + 663680.

Almost surely, 2^12855344850 is an apocalyptic number.

12855344850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12855344850 is an abundant number, since it is smaller than the sum of its proper divisors (21708209682).

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

12855344850 is a wasteful number, since it uses less digits than its factorization.

12855344850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21132 (or 21124 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 12855344850 in words is "twelve billion, eight hundred fifty-five million, three hundred forty-four thousand, eight hundred fifty".