12481236405 has 32 divisors (see below), whose sum is σ = 24206037120. Its totient is φ = 6051507840.

The previous prime is 12481236403. The next prime is 12481236463. The reversal of 12481236405 is 50463218421.

It is a happy number.

12481236405 is a `hidden beast` number, since 1 + 2 + 4 + 8 + 1 + 2 + 3 + 640 + 5 = 666.

It is not a de Polignac number, because 12481236405 - 2¹ = 12481236403 is a prime.

It is a super-3 number, since 3×12481236405³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12481236405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12481236403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4200952 + ... + 4203921.

It is an arithmetic number, because the mean of its divisors is an integer number (756438660).

Almost surely, 2^12481236405 is an apocalyptic number.

12481236405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12481236405 is a deficient number, since it is larger than the sum of its proper divisors (11724800715).

12481236405 is a wasteful number, since it uses less digits than its factorization.

12481236405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404898 (or 8404892 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 12481236405 in words is "twelve billion, four hundred eighty-one million, two hundred thirty-six thousand, four hundred five".