254544342444421 has 2 divisors, whose sum is σ = 254544342444422. Its totient is φ = 254544342444420.

The previous prime is 254544342444419. The next prime is 254544342444461. The reversal of 254544342444421 is 124444243445452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208984204913796 + 45560137530625 = 14456286^2 + 6749825^2 .

It is a cyclic number.

It is not a de Polignac number, because 254544342444421 - 2¹ = 254544342444419 is a prime.

Together with 254544342444419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254544342444461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127272171222210 + 127272171222211.

It is an arithmetic number, because the mean of its divisors is an integer number (127272171222211).

Almost surely, 2^{254544342444421} is an apocalyptic number.

It is an amenable number.

254544342444421 is a deficient number, since it is larger than the sum of its proper divisors (1).

254544342444421 is an equidigital number, since it uses as much as digits as its factorization.

254544342444421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39321600, while the sum is 52.

Adding to 254544342444421 its reverse (124444243445452), we get a palindrome (378988585889873).

The spelling of 254544342444421 in words is "two hundred fifty-four trillion, five hundred forty-four billion, three hundred forty-two million, four hundred forty-four thousand, four hundred twenty-one".