12565746423 has 48 divisors (see below), whose sum is σ = 19698691584. Its totient is φ = 7697954880.

The previous prime is 12565746421. The next prime is 12565746437. The reversal of 12565746423 is 32464756521.

12565746423 is a `hidden beast` number, since 1 + 2 + 56 + 574 + 6 + 4 + 23 = 666.

It is not a de Polignac number, because 12565746423 - 2¹ = 12565746421 is a prime.

It is a super-3 number, since 3×12565746423³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565746421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 531390 + ... + 554532.

It is an arithmetic number, because the mean of its divisors is an integer number (410389408).

Almost surely, 2^12565746423 is an apocalyptic number.

12565746423 is a deficient number, since it is larger than the sum of its proper divisors (7132945161).

12565746423 is a wasteful number, since it uses less digits than its factorization.

12565746423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23276 (or 23273 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 12565746423 in words is "twelve billion, five hundred sixty-five million, seven hundred forty-six thousand, four hundred twenty-three".