378044352221 has 2 divisors, whose sum is σ = 378044352222. Its totient is φ = 378044352220.

The previous prime is 378044352109. The next prime is 378044352223. The reversal of 378044352221 is 122253440873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255464539225 + 122579812996 = 505435^2 + 350114^2 .

It is a cyclic number.

It is not a de Polignac number, because 378044352221 - 2¹⁸ = 378044090077 is a prime.

It is a Sophie Germain prime.

Together with 378044352223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378044352223) 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 as a sum of consecutive naturals, namely, 189022176110 + 189022176111.

It is an arithmetic number, because the mean of its divisors is an integer number (189022176111).

Almost surely, 2^378044352221 is an apocalyptic number.

It is an amenable number.

378044352221 is a deficient number, since it is larger than the sum of its proper divisors (1).

378044352221 is an equidigital number, since it uses as much as digits as its factorization.

378044352221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 378044352221 in words is "three hundred seventy-eight billion, forty-four million, three hundred fifty-two thousand, two hundred twenty-one".