204451326603401 has 4 divisors (see below), whose sum is σ = 204459384459012. Its totient is φ = 204443268747792.

The previous prime is 204451326603389. The next prime is 204451326603409. The reversal of 204451326603401 is 104306623154402.

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 8710968559225 + 195740358044176 = 2951435^2 + 13990724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204451326603401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204451326603409) 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, 4028889746 + ... + 4028940491.

It is an arithmetic number, because the mean of its divisors is an integer number (51114846114753).

Almost surely, 2^{204451326603401} is an apocalyptic number.

It is an amenable number.

204451326603401 is a deficient number, since it is larger than the sum of its proper divisors (8057855611).

204451326603401 is an equidigital number, since it uses as much as digits as its factorization.

204451326603401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057855610.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 204451326603401 its reverse (104306623154402), we get a palindrome (308757949757803).

The spelling of 204451326603401 in words is "two hundred four trillion, four hundred fifty-one billion, three hundred twenty-six million, six hundred three thousand, four hundred one".