12690543388 has 24 divisors (see below), whose sum is σ = 23712974208. Its totient is φ = 5928239856.

The previous prime is 12690543373. The next prime is 12690543413. The reversal of 12690543388 is 88334509621.

12690543388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12690543388² (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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1600006 + ... + 1607917.

It is an arithmetic number, because the mean of its divisors is an integer number (988040592).

Almost surely, 2^12690543388 is an apocalyptic number.

It is an amenable number.

12690543388 is a deficient number, since it is larger than the sum of its proper divisors (11022430820).

12690543388 is a wasteful number, since it uses less digits than its factorization.

12690543388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207993 (or 3207991 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 12690543388 in words is "twelve billion, six hundred ninety million, five hundred forty-three thousand, three hundred eighty-eight".