378844890157 has 2 divisors, whose sum is σ = 378844890158. Its totient is φ = 378844890156.

The previous prime is 378844890139. The next prime is 378844890191. The reversal of 378844890157 is 751098448873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212331110436 + 166513779721 = 460794^2 + 408061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378844890157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378844890757) 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, 189422445078 + 189422445079.

It is an arithmetic number, because the mean of its divisors is an integer number (189422445079).

Almost surely, 2^378844890157 is an apocalyptic number.

It is an amenable number.

378844890157 is a deficient number, since it is larger than the sum of its proper divisors (1).

378844890157 is an equidigital number, since it uses as much as digits as its factorization.

378844890157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 378844890157 in words is "three hundred seventy-eight billion, eight hundred forty-four million, eight hundred ninety thousand, one hundred fifty-seven".