378451906529 has 2 divisors, whose sum is σ = 378451906530. Its totient is φ = 378451906528.

The previous prime is 378451906523. The next prime is 378451906531. The reversal of 378451906529 is 925609154873.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375306940129 + 3144966400 = 612623^2 + 56080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378451906529 is a prime.

Together with 378451906531, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (378451906523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189225953264 + 189225953265.

It is an arithmetic number, because the mean of its divisors is an integer number (189225953265).

It is a 1-persistent number, because it is pandigital, but 2⋅378451906529 = 756903813058 is not.

Almost surely, 2^378451906529 is an apocalyptic number.

It is an amenable number.

378451906529 is a deficient number, since it is larger than the sum of its proper divisors (1).

378451906529 is an equidigital number, since it uses as much as digits as its factorization.

378451906529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 378451906529 in words is "three hundred seventy-eight billion, four hundred fifty-one million, nine hundred six thousand, five hundred twenty-nine".