12523135254565 has 16 divisors (see below), whose sum is σ = 16194125001600. Its totient is φ = 9241921737792.

The previous prime is 12523135254557. The next prime is 12523135254571. The reversal of 12523135254565 is 56545253132521.

It is a cyclic number.

It is not a de Polignac number, because 12523135254565 - 2³ = 12523135254557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61689435 + ... + 61892104.

It is an arithmetic number, because the mean of its divisors is an integer number (1012132812600).

Almost surely, 2^{12523135254565} is an apocalyptic number.

It is an amenable number.

12523135254565 is a deficient number, since it is larger than the sum of its proper divisors (3670989747035).

12523135254565 is a wasteful number, since it uses less digits than its factorization.

12523135254565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123583116.

The product of its digits is 5400000, while the sum is 49.

The spelling of 12523135254565 in words is "twelve trillion, five hundred twenty-three billion, one hundred thirty-five million, two hundred fifty-four thousand, five hundred sixty-five".