12938856401 has 4 divisors (see below), whose sum is σ = 13084236900. Its totient is φ = 12793475904.

The previous prime is 12938856373. The next prime is 12938856407. The reversal of 12938856401 is 10465883921.

It is a happy number.

12938856401 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5818028176 + 7120828225 = 76276^2 + 84385^2 .

It is a cyclic number.

It is not a de Polignac number, because 12938856401 - 2¹⁸ = 12938594257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12938856407) 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 3 ways as a sum of consecutive naturals, for example, 72690116 + ... + 72690293.

It is an arithmetic number, because the mean of its divisors is an integer number (3271059225).

Almost surely, 2^12938856401 is an apocalyptic number.

It is an amenable number.

12938856401 is a deficient number, since it is larger than the sum of its proper divisors (145380499).

12938856401 is an equidigital number, since it uses as much as digits as its factorization.

12938856401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145380498.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 12938856401 in words is "twelve billion, nine hundred thirty-eight million, eight hundred fifty-six thousand, four hundred one".