12656450123 has 2 divisors, whose sum is σ = 12656450124. Its totient is φ = 12656450122.

The previous prime is 12656450111. The next prime is 12656450137. The reversal of 12656450123 is 32105465621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12656450123 is a prime.

It is not a weakly prime, because it can be changed into another prime (12656450423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328225061 + 6328225062.

It is an arithmetic number, because the mean of its divisors is an integer number (6328225062).

Almost surely, 2^12656450123 is an apocalyptic number.

12656450123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656450123 is an equidigital number, since it uses as much as digits as its factorization.

12656450123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12656450123 in words is "twelve billion, six hundred fifty-six million, four hundred fifty thousand, one hundred twenty-three".