378354156449 has 2 divisors, whose sum is σ = 378354156450. Its totient is φ = 378354156448.

The previous prime is 378354156403. The next prime is 378354156461. The reversal of 378354156449 is 944651453873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331424733025 + 46929423424 = 575695^2 + 216632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378354156449 is a prime.

It is not a weakly prime, because it can be changed into another prime (378354156469) 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, 189177078224 + 189177078225.

It is an arithmetic number, because the mean of its divisors is an integer number (189177078225).

Almost surely, 2^378354156449 is an apocalyptic number.

It is an amenable number.

378354156449 is a deficient number, since it is larger than the sum of its proper divisors (1).

378354156449 is an equidigital number, since it uses as much as digits as its factorization.

378354156449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 59.

The spelling of 378354156449 in words is "three hundred seventy-eight billion, three hundred fifty-four million, one hundred fifty-six thousand, four hundred forty-nine".