12731500756 has 24 divisors (see below), whose sum is σ = 24135975080. Its totient is φ = 5876073216.

The previous prime is 12731500741. The next prime is 12731500777. The reversal of 12731500756 is 65700513721.

It can be written as a sum of positive squares in 4 ways, for example, as 5461210000 + 7270290756 = 73900^2 + 85266^2 .

It is a super-2 number, since 2×12731500756² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715581 + ... + 733156.

Almost surely, 2^12731500756 is an apocalyptic number.

It is an amenable number.

12731500756 is a deficient number, since it is larger than the sum of its proper divisors (11404474324).

12731500756 is a wasteful number, since it uses less digits than its factorization.

12731500756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448780 (or 1448752 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 37.

The spelling of 12731500756 in words is "twelve billion, seven hundred thirty-one million, five hundred thousand, seven hundred fifty-six".