12511323434 has 16 divisors (see below), whose sum is σ = 20556131400. Its totient is φ = 5684657664.

The previous prime is 12511323413. The next prime is 12511323467. The reversal of 12511323434 is 43432311521.

It can be written as a sum of positive squares in 4 ways, for example, as 12299475409 + 211848025 = 110903^2 + 14555^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 12511323397 and 12511323406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6343499 + ... + 6345470.

Almost surely, 2^12511323434 is an apocalyptic number.

12511323434 is a deficient number, since it is larger than the sum of its proper divisors (8044807966).

12511323434 is a wasteful number, since it uses less digits than its factorization.

12511323434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12689017.

The product of its digits is 8640, while the sum is 29.

Adding to 12511323434 its reverse (43432311521), we get a palindrome (55943634955).

The spelling of 12511323434 in words is "twelve billion, five hundred eleven million, three hundred twenty-three thousand, four hundred thirty-four".