13523566025 has 6 divisors (see below), whose sum is σ = 16769221902. Its totient is φ = 10818852800.

The previous prime is 13523565961. The next prime is 13523566037. The reversal of 13523566025 is 52066532531.

It can be written as a sum of positive squares in 3 ways, for example, as 5550736 + 13518015289 = 2356^2 + 116267^2 .

It is not a de Polignac number, because 13523566025 - 2⁶ = 13523565961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13523566025.

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, 270471296 + ... + 270471345.

It is an arithmetic number, because the mean of its divisors is an integer number (2794870317).

Almost surely, 2^13523566025 is an apocalyptic number.

It is an amenable number.

13523566025 is a deficient number, since it is larger than the sum of its proper divisors (3245655877).

13523566025 is an equidigital number, since it uses as much as digits as its factorization.

13523566025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540942651 (or 540942646 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 13523566025 in words is "thirteen billion, five hundred twenty-three million, five hundred sixty-six thousand, twenty-five".