378855047771 has 2 divisors, whose sum is σ = 378855047772. Its totient is φ = 378855047770.

The previous prime is 378855047761. The next prime is 378855047773. The reversal of 378855047771 is 177740558873.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378855047771 is a prime.

It is a super-2 number, since 2×378855047771² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 378855047773, 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 (378855047773) 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, 189427523885 + 189427523886.

It is an arithmetic number, because the mean of its divisors is an integer number (189427523886).

Almost surely, 2^378855047771 is an apocalyptic number.

378855047771 is a deficient number, since it is larger than the sum of its proper divisors (1).

378855047771 is an equidigital number, since it uses as much as digits as its factorization.

378855047771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46099200, while the sum is 62.

The spelling of 378855047771 in words is "three hundred seventy-eight billion, eight hundred fifty-five million, forty-seven thousand, seven hundred seventy-one".