378555563 has 4 divisors (see below), whose sum is σ = 398479560. Its totient is φ = 358631568.

The previous prime is 378555557. The next prime is 378555571. The reversal of 378555563 is 365555873.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 378555563 - 2²² = 374361259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378555503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9961970 + ... + 9962007.

It is an arithmetic number, because the mean of its divisors is an integer number (99619890).

Almost surely, 2^378555563 is an apocalyptic number.

378555563 is a deficient number, since it is larger than the sum of its proper divisors (19923997).

378555563 is a wasteful number, since it uses less digits than its factorization.

378555563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19923996.

The product of its digits is 1890000, while the sum is 47.

The square root of 378555563 is about 19456.5043879932. The cubic root of 378555563 is about 723.3967349175.

The spelling of 378555563 in words is "three hundred seventy-eight million, five hundred fifty-five thousand, five hundred sixty-three".