378855064566 has 64 divisors (see below), whose sum is σ = 927020194560. Its totient is φ = 113731606080.

The previous prime is 378855064559. The next prime is 378855064573. The reversal of 378855064566 is 665460558873.

378855064566 is a `hidden beast` number, since 3 + 7 + 8 + 8 + 5 + 5 + 0 + 64 + 566 = 666.

It is an interprime number because it is at equal distance from previous prime (378855064559) and next prime (378855064573).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2916831 + ... + 3043946.

It is an arithmetic number, because the mean of its divisors is an integer number (14484690540).

Almost surely, 2^378855064566 is an apocalyptic number.

378855064566 is an abundant number, since it is smaller than the sum of its proper divisors (548165129994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378855064566 is a wasteful number, since it uses less digits than its factorization.

378855064566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960906 (or 5960900 counting only the distinct ones).

The product of its (nonzero) digits is 145152000, while the sum is 63.

The spelling of 378855064566 in words is "three hundred seventy-eight billion, eight hundred fifty-five million, sixty-four thousand, five hundred sixty-six".