12451171825 has 12 divisors (see below), whose sum is σ = 15441144268. Its totient is φ = 9959846400.

The previous prime is 12451171813. The next prime is 12451171847. The reversal of 12451171825 is 52817115421.

It can be written as a sum of positive squares in 6 ways, for example, as 91068849 + 12360102976 = 9543^2 + 111176^2 .

It is not a de Polignac number, because 12451171825 - 2¹¹ = 12451169777 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 268345 + ... + 311305.

Almost surely, 2^12451171825 is an apocalyptic number.

It is an amenable number.

12451171825 is a deficient number, since it is larger than the sum of its proper divisors (2989972443).

12451171825 is a wasteful number, since it uses less digits than its factorization.

12451171825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54564 (or 54559 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The spelling of 12451171825 in words is "twelve billion, four hundred fifty-one million, one hundred seventy-one thousand, eight hundred twenty-five".