12890040025 has 6 divisors (see below), whose sum is σ = 15983649662. Its totient is φ = 10312032000.

The previous prime is 12890040013. The next prime is 12890040041. The reversal of 12890040025 is 52004009821.

It can be written as a sum of positive squares in 3 ways, for example, as 3778192089 + 9111847936 = 61467^2 + 95456^2 .

It is not a de Polignac number, because 12890040025 - 2¹¹ = 12890037977 is a prime.

It is a super-2 number, since 2×12890040025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 257800776 + ... + 257800825.

Almost surely, 2^12890040025 is an apocalyptic number.

It is an amenable number.

12890040025 is a deficient number, since it is larger than the sum of its proper divisors (3093609637).

12890040025 is an equidigital number, since it uses as much as digits as its factorization.

12890040025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515601611 (or 515601606 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 12890040025 its reverse (52004009821), we get a palindrome (64894049846).

The spelling of 12890040025 in words is "twelve billion, eight hundred ninety million, forty thousand, twenty-five".