12555203120 has 80 divisors (see below), whose sum is σ = 30974088960. Its totient is φ = 4716552192.

The previous prime is 12555203117. The next prime is 12555203149. The reversal of 12555203120 is 2130255521.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12555203120.

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, 641804 + ... + 661076.

It is an arithmetic number, because the mean of its divisors is an integer number (387176112).

Almost surely, 2^12555203120 is an apocalyptic number.

12555203120 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 12555203120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15487044480).

12555203120 is an abundant number, since it is smaller than the sum of its proper divisors (18418885840).

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

12555203120 is a wasteful number, since it uses less digits than its factorization.

12555203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19782 (or 19776 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 12555203120 its reverse (2130255521), we get a palindrome (14685458641).

The spelling of 12555203120 in words is "twelve billion, five hundred fifty-five million, two hundred three thousand, one hundred twenty".