12513445533 has 6 divisors (see below), whose sum is σ = 18074976894. Its totient is φ = 8342297016.

The previous prime is 12513445531. The next prime is 12513445537. The reversal of 12513445533 is 33554431521.

12513445533 is a `hidden beast` number, since 1 + 2 + 51 + 34 + 45 + 533 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7443720729 + 5069724804 = 86277^2 + 71202^2 .

It is not a de Polignac number, because 12513445533 - 2¹ = 12513445531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513445531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695191410 + ... + 695191427.

It is an arithmetic number, because the mean of its divisors is an integer number (3012496149).

Almost surely, 2^12513445533 is an apocalyptic number.

It is an amenable number.

12513445533 is a deficient number, since it is larger than the sum of its proper divisors (5561531361).

12513445533 is a wasteful number, since it uses less digits than its factorization.

12513445533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390382843 (or 1390382840 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 12513445533 in words is "twelve billion, five hundred thirteen million, four hundred forty-five thousand, five hundred thirty-three".