12639238800 has 120 divisors (see below), whose sum is σ = 40517820384. Its totient is φ = 3367956480.

The previous prime is 12639238793. The next prime is 12639238819. The reversal of 12639238800 is 883293621.

It is a tau number, because it is divible by the number of its divisors (120).

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, 2064544 + ... + 2070656.

Almost surely, 2^12639238800 is an apocalyptic number.

12639238800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12639238800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20258910192).

12639238800 is an abundant number, since it is smaller than the sum of its proper divisors (27878581584).

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

12639238800 is a wasteful number, since it uses less digits than its factorization.

12639238800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857 (or 7846 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 12639238800 in words is "twelve billion, six hundred thirty-nine million, two hundred thirty-eight thousand, eight hundred".