12155002600 has 96 divisors (see below), whose sum is σ = 30503282040. Its totient is φ = 4477824000.

The previous prime is 12155002591. The next prime is 12155002621. The reversal of 12155002600 is 620055121.

It can be written as a sum of positive squares in 12 ways, for example, as 525968356 + 11629034244 = 22934^2 + 107838^2 .

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, 1193530 + ... + 1203670.

Almost surely, 2^12155002600 is an apocalyptic number.

12155002600 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 12155002600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15251641020).

12155002600 is an abundant number, since it is smaller than the sum of its proper divisors (18348279440).

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

12155002600 is a wasteful number, since it uses less digits than its factorization.

12155002600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631 (or 10622 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 12155002600 its reverse (620055121), we get a palindrome (12775057721).

The spelling of 12155002600 in words is "twelve billion, one hundred fifty-five million, two thousand, six hundred".