12400432552 has 16 divisors (see below), whose sum is σ = 23254377300. Its totient is φ = 6199265280.

The previous prime is 12400432549. The next prime is 12400432607. The reversal of 12400432552 is 25523400421.

It can be written as a sum of positive squares in 2 ways, for example, as 10591291396 + 1809141156 = 102914^2 + 42534^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12400432552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61849 + ... + 169192.

Almost surely, 2^12400432552 is an apocalyptic number.

It is an amenable number.

12400432552 is a deficient number, since it is larger than the sum of its proper divisors (10853944748).

12400432552 is a wasteful number, since it uses less digits than its factorization.

12400432552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237756 (or 237752 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 12400432552 its reverse (25523400421), we get a palindrome (37923832973).

The spelling of 12400432552 in words is "twelve billion, four hundred million, four hundred thirty-two thousand, five hundred fifty-two".