12523440025 has 12 divisors (see below), whose sum is σ = 15534627372. Its totient is φ = 10015163840.

The previous prime is 12523440023. The next prime is 12523440203. The reversal of 12523440025 is 52004432521.

It can be written as a sum of positive squares in 6 ways, for example, as 284664384 + 12238775641 = 16872^2 + 110629^2 .

It is not a de Polignac number, because 12523440025 - 2¹ = 12523440023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12523439975 and 12523440002.

It is not an unprimeable number, because it can be changed into a prime (12523440023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17362 + ... + 159211.

It is an arithmetic number, because the mean of its divisors is an integer number (1294552281).

Almost surely, 2^12523440025 is an apocalyptic number.

It is an amenable number.

12523440025 is a deficient number, since it is larger than the sum of its proper divisors (3011187347).

12523440025 is a wasteful number, since it uses less digits than its factorization.

12523440025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179420 (or 179415 counting only the distinct ones).

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

Adding to 12523440025 its reverse (52004432521), we get a palindrome (64527872546).

The spelling of 12523440025 in words is "twelve billion, five hundred twenty-three million, four hundred forty thousand, twenty-five".