12731494536 has 24 divisors (see below), whose sum is σ = 34481131230. Its totient is φ = 4243831488.

The previous prime is 12731494513. The next prime is 12731494541. The reversal of 12731494536 is 63549413721.

12731494536 is a `hidden beast` number, since 1 + 2 + 73 + 1 + 49 + 4 + 536 = 666.

12731494536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12255818436 + 475676100 = 110706^2 + 21810^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 12731494491 and 12731494500.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 88413085 + ... + 88413228.

Almost surely, 2^12731494536 is an apocalyptic number.

It is an amenable number.

12731494536 is an abundant number, since it is smaller than the sum of its proper divisors (21749636694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12731494536 is a wasteful number, since it uses less digits than its factorization.

12731494536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176826325 (or 176826318 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 12731494536 in words is "twelve billion, seven hundred thirty-one million, four hundred ninety-four thousand, five hundred thirty-six".