12535745281 has 16 divisors (see below), whose sum is σ = 13035415680. Its totient is φ = 12048094080.

The previous prime is 12535745279. The next prime is 12535745293. The reversal of 12535745281 is 18254753521.

It is a cyclic number.

It is not a de Polignac number, because 12535745281 - 2¹ = 12535745279 is a prime.

It is a super-2 number, since 2×12535745281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12535745221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590605 + ... + 611461.

It is an arithmetic number, because the mean of its divisors is an integer number (814713480).

Almost surely, 2^12535745281 is an apocalyptic number.

It is an amenable number.

12535745281 is a deficient number, since it is larger than the sum of its proper divisors (499670399).

12535745281 is a wasteful number, since it uses less digits than its factorization.

12535745281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21144.

The product of its digits is 336000, while the sum is 43.

The spelling of 12535745281 in words is "twelve billion, five hundred thirty-five million, seven hundred forty-five thousand, two hundred eighty-one".