12656331502 has 4 divisors (see below), whose sum is σ = 18984497256. Its totient is φ = 6328165750.

The previous prime is 12656331473. The next prime is 12656331559. The reversal of 12656331502 is 20513365621.

12656331502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20513365621 = 7 ⋅2930480803.

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 as a sum of consecutive naturals, namely, 3164082874 + ... + 3164082877.

It is an arithmetic number, because the mean of its divisors is an integer number (4746124314).

Almost surely, 2^12656331502 is an apocalyptic number.

12656331502 is a deficient number, since it is larger than the sum of its proper divisors (6328165754).

12656331502 is an equidigital number, since it uses as much as digits as its factorization.

12656331502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6328165753.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 12656331502 in words is "twelve billion, six hundred fifty-six million, three hundred thirty-one thousand, five hundred two".