12555430400 has 60 divisors (see below), whose sum is σ = 31107091422. Its totient is φ = 5022167040.

The previous prime is 12555430319. The next prime is 12555430411. The reversal of 12555430400 is 403455521.

It can be written as a sum of positive squares in 3 ways, for example, as 11931629824 + 623800576 = 109232^2 + 24976^2 .

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, 477647 + ... + 503246.

Almost surely, 2^12555430400 is an apocalyptic number.

12555430400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12555430400 is an abundant number, since it is smaller than the sum of its proper divisors (18551661022).

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

12555430400 is an frugal number, since it uses more digits than its factorization.

12555430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980921 (or 980900 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 12555430400 its reverse (403455521), we get a palindrome (12958885921).

The spelling of 12555430400 in words is "twelve billion, five hundred fifty-five million, four hundred thirty thousand, four hundred".