12510400025 has 24 divisors (see below), whose sum is σ = 15861943104. Its totient is φ = 9785102400.

The previous prime is 12510399983. The next prime is 12510400027. The reversal of 12510400025 is 52000401521.

It is not a de Polignac number, because 12510400025 - 2⁶ = 12510399961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12510400027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230114 + ... + 279236.

It is an arithmetic number, because the mean of its divisors is an integer number (660914296).

Almost surely, 2^12510400025 is an apocalyptic number.

It is an amenable number.

12510400025 is a deficient number, since it is larger than the sum of its proper divisors (3351543079).

12510400025 is a wasteful number, since it uses less digits than its factorization.

12510400025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49361 (or 49356 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 12510400025 its reverse (52000401521), we get a palindrome (64510801546).

The spelling of 12510400025 in words is "twelve billion, five hundred ten million, four hundred thousand, twenty-five".