385055566 has 16 divisors (see below), whose sum is σ = 669949056. Its totient is φ = 162560376.

The previous prime is 385055551. The next prime is 385055597. The reversal of 385055566 is 665550583.

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 7 ways as a sum of consecutive naturals, for example, 204316 + ... + 206191.

It is an arithmetic number, because the mean of its divisors is an integer number (41871816).

Almost surely, 2^385055566 is an apocalyptic number.

385055566 is a deficient number, since it is larger than the sum of its proper divisors (284893490).

385055566 is a wasteful number, since it uses less digits than its factorization.

385055566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410583.

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 385055566 is about 19622.8327720541. The cubic root of 385055566 is about 727.5136315313.

The spelling of 385055566 in words is "three hundred eighty-five million, fifty-five thousand, five hundred sixty-six".