12805638000 has 80 divisors (see below), whose sum is σ = 41285396256. Its totient is φ = 3414835200.

The previous prime is 12805637981. The next prime is 12805638023. The reversal of 12805638000 is 83650821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061137 + ... + 1073136.

Almost surely, 2^12805638000 is an apocalyptic number.

12805638000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12805638000 is an abundant number, since it is smaller than the sum of its proper divisors (28479758256).

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

12805638000 is a wasteful number, since it uses less digits than its factorization.

12805638000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134299 (or 2134283 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 12805638000 in words is "twelve billion, eight hundred five million, six hundred thirty-eight thousand".