378395474477 has 2 divisors, whose sum is σ = 378395474478. Its totient is φ = 378395474476.

The previous prime is 378395474459. The next prime is 378395474497. The reversal of 378395474477 is 774474593873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325571806921 + 52823667556 = 570589^2 + 229834^2 .

It is an emirp because it is prime and its reverse (774474593873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 378395474477 - 2¹⁰ = 378395473453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378395474497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189197737238 + 189197737239.

It is an arithmetic number, because the mean of its divisors is an integer number (189197737239).

Almost surely, 2^378395474477 is an apocalyptic number.

It is an amenable number.

378395474477 is a deficient number, since it is larger than the sum of its proper divisors (1).

378395474477 is an equidigital number, since it uses as much as digits as its factorization.

378395474477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497871360, while the sum is 68.

The spelling of 378395474477 in words is "three hundred seventy-eight billion, three hundred ninety-five million, four hundred seventy-four thousand, four hundred seventy-seven".