12505449600 has 1536 divisors, whose sum is σ = 58281984000. Its totient is φ = 2554675200.

The previous prime is 12505449599. The next prime is 12505449601. The reversal of 12505449600 is 694450521.

12505449600 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 5 + 4 + 49 + 600 = 666.

It is an interprime number because it is at equal distance from previous prime (12505449599) and next prime (12505449601).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12505449601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 403401585 + ... + 403401615.

It is an arithmetic number, because the mean of its divisors is an integer number (37944000).

Almost surely, 2^12505449600 is an apocalyptic number.

12505449600 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 12505449600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29140992000).

12505449600 is an abundant number, since it is smaller than the sum of its proper divisors (45776534400).

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

12505449600 is a wasteful number, since it uses less digits than its factorization.

12505449600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 12505449600 in words is "twelve billion, five hundred five million, four hundred forty-nine thousand, six hundred".