378015500257 has 2 divisors, whose sum is σ = 378015500258. Its totient is φ = 378015500256.

The previous prime is 378015500171. The next prime is 378015500297. The reversal of 378015500257 is 752005510873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348048081936 + 29967418321 = 589956^2 + 173111^2 .

It is a cyclic number.

It is not a de Polignac number, because 378015500257 - 2²³ = 378007111649 is a prime.

It is not a weakly prime, because it can be changed into another prime (378015500297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189007750128 + 189007750129.

It is an arithmetic number, because the mean of its divisors is an integer number (189007750129).

Almost surely, 2^378015500257 is an apocalyptic number.

It is an amenable number.

378015500257 is a deficient number, since it is larger than the sum of its proper divisors (1).

378015500257 is an equidigital number, since it uses as much as digits as its factorization.

378015500257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294000, while the sum is 43.

The spelling of 378015500257 in words is "three hundred seventy-eight billion, fifteen million, five hundred thousand, two hundred fifty-seven".