378813533377 has 2 divisors, whose sum is σ = 378813533378. Its totient is φ = 378813533376.

The previous prime is 378813533309. The next prime is 378813533381. The reversal of 378813533377 is 773335318873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352704144321 + 26109389056 = 593889^2 + 161584^2 .

It is a cyclic number.

It is not a de Polignac number, because 378813533377 - 2⁷ = 378813533249 is a prime.

It is not a weakly prime, because it can be changed into another prime (378813503377) 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, 189406766688 + 189406766689.

It is an arithmetic number, because the mean of its divisors is an integer number (189406766689).

Almost surely, 2^378813533377 is an apocalyptic number.

It is an amenable number.

378813533377 is a deficient number, since it is larger than the sum of its proper divisors (1).

378813533377 is an equidigital number, since it uses as much as digits as its factorization.

378813533377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 58.

The spelling of 378813533377 in words is "three hundred seventy-eight billion, eight hundred thirteen million, five hundred thirty-three thousand, three hundred seventy-seven".