12664491524 has 24 divisors (see below), whose sum is σ = 22210406400. Its totient is φ = 6318679680.

The previous prime is 12664491509. The next prime is 12664491527. The reversal of 12664491524 is 42519446621.

It is a happy number.

12664491524 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 2×12664491524² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12664491527) 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, 5655197 + ... + 5657435.

It is an arithmetic number, because the mean of its divisors is an integer number (925433600).

Almost surely, 2^12664491524 is an apocalyptic number.

It is an amenable number.

12664491524 is a deficient number, since it is larger than the sum of its proper divisors (9545914876).

12664491524 is a wasteful number, since it uses less digits than its factorization.

12664491524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643 (or 4641 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 12664491524 in words is "twelve billion, six hundred sixty-four million, four hundred ninety-one thousand, five hundred twenty-four".