12555450000 has 180 divisors, whose sum is σ = 43921040436. Its totient is φ = 3348000000.

The previous prime is 12555449941. The next prime is 12555450007. The reversal of 12555450000 is 5455521.

It can be written as a sum of positive squares in 6 ways, for example, as 7749633024 + 4805816976 = 88032^2 + 69324^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is not an unprimeable number, because it can be changed into a prime (12555450007) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 436050 + ... + 463950.

Almost surely, 2^12555450000 is an apocalyptic number.

12555450000 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 12555450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21960520218).

12555450000 is an abundant number, since it is smaller than the sum of its proper divisors (31365590436).

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

12555450000 is an equidigital number, since it uses as much as digits as its factorization.

12555450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27940 (or 27911 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The spelling of 12555450000 in words is "twelve billion, five hundred fifty-five million, four hundred fifty thousand".