12511043200400 has 30 divisors (see below), whose sum is σ = 30057781289922. Its totient is φ = 5004417280000.

The previous prime is 12511043200367. The next prime is 12511043200427. The reversal of 12511043200400 is 400234011521.

It can be written as a sum of positive squares in 3 ways, for example, as 179596268944 + 12331446931456 = 423788^2 + 3511616^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15638803601 + ... + 15638804400.

Almost surely, 2^{12511043200400} is an apocalyptic number.

12511043200400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511043200400 is an abundant number, since it is smaller than the sum of its proper divisors (17546738089522).

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

12511043200400 is a wasteful number, since it uses less digits than its factorization.

12511043200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31277608019 (or 31277608008 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12511043200400 its reverse (400234011521), we get a palindrome (12911277211921).

The spelling of 12511043200400 in words is "twelve trillion, five hundred eleven billion, forty-three million, two hundred thousand, four hundred".