12923449806401 has 4 divisors (see below), whose sum is σ = 12923800062804. Its totient is φ = 12923099550000.

The previous prime is 12923449806389. The next prime is 12923449806451. The reversal of 12923449806401 is 10460894432921.

It is a happy number.

It is a Cunningham number, because it is equal to 3594920²+1.

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 251622624400 + 12671827182001 = 501620^2 + 3559751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12923449806401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12923449806451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175072850 + ... + 175146651.

It is an arithmetic number, because the mean of its divisors is an integer number (3230950015701).

Almost surely, 2^{12923449806401} is an apocalyptic number.

It is an amenable number.

12923449806401 is a deficient number, since it is larger than the sum of its proper divisors (350256403).

12923449806401 is an equidigital number, since it uses as much as digits as its factorization.

12923449806401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350256402.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 12923449806401 in words is "twelve trillion, nine hundred twenty-three billion, four hundred forty-nine million, eight hundred six thousand, four hundred one".