378668094521 has 2 divisors, whose sum is σ = 378668094522. Its totient is φ = 378668094520.

The previous prime is 378668094463. The next prime is 378668094611. The reversal of 378668094521 is 125490866873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352598440000 + 26069654521 = 593800^2 + 161461^2 .

It is a cyclic number.

It is not a de Polignac number, because 378668094521 - 2¹⁰ = 378668093497 is a prime.

It is not a weakly prime, because it can be changed into another prime (378668094221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189334047260 + 189334047261.

It is an arithmetic number, because the mean of its divisors is an integer number (189334047261).

It is a 2-persistent number, because it is pandigital, and so is 2⋅378668094521 = 757336189042, but 3⋅378668094521 = 1136004283563 is not.

Almost surely, 2^378668094521 is an apocalyptic number.

It is an amenable number.

378668094521 is a deficient number, since it is larger than the sum of its proper divisors (1).

378668094521 is an equidigital number, since it uses as much as digits as its factorization.

378668094521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 378668094521 in words is "three hundred seventy-eight billion, six hundred sixty-eight million, ninety-four thousand, five hundred twenty-one".