12855841840 has 20 divisors (see below), whose sum is σ = 29889832464. Its totient is φ = 5142336704.

The previous prime is 12855841819. The next prime is 12855841853. The reversal of 12855841840 is 4814855821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80348932 + ... + 80349091.

Almost surely, 2^12855841840 is an apocalyptic number.

12855841840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12855841840 is an abundant number, since it is smaller than the sum of its proper divisors (17033990624).

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

12855841840 is a wasteful number, since it uses less digits than its factorization.

12855841840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160698036 (or 160698030 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 46.

The spelling of 12855841840 in words is "twelve billion, eight hundred fifty-five million, eight hundred forty-one thousand, eight hundred forty".