12427738581 has 8 divisors (see below), whose sum is σ = 16572223584. Its totient is φ = 8284206320.

The previous prime is 12427738579. The next prime is 12427738591. The reversal of 12427738581 is 18583772421.

12427738581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12427738581 - 2¹ = 12427738579 is a prime.

It is a super-2 number, since 2×12427738581² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12427738581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12427738501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207171 + ... + 260336.

It is an arithmetic number, because the mean of its divisors is an integer number (2071527948).

Almost surely, 2^12427738581 is an apocalyptic number.

It is an amenable number.

12427738581 is a deficient number, since it is larger than the sum of its proper divisors (4144485003).

12427738581 is an equidigital number, since it uses as much as digits as its factorization.

12427738581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476371.

The product of its digits is 752640, while the sum is 48.

The spelling of 12427738581 in words is "twelve billion, four hundred twenty-seven million, seven hundred thirty-eight thousand, five hundred eighty-one".