805381550 has 48 divisors (see below), whose sum is σ = 1553769600. Its totient is φ = 310262400.

The previous prime is 805381543. The next prime is 805381589. The reversal of 805381550 is 55183508.

It is a self number, because there is not a number n which added to its sum of digits gives 805381550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353816 + ... + 356084.

It is an arithmetic number, because the mean of its divisors is an integer number (32370200).

Almost surely, 2^805381550 is an apocalyptic number.

805381550 is a deficient number, since it is larger than the sum of its proper divisors (748388050).

805381550 is a wasteful number, since it uses less digits than its factorization.

805381550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 805381550 is about 28379.2450569073. The cubic root of 805381550 is about 930.3946950710.

The spelling of 805381550 in words is "eight hundred five million, three hundred eighty-one thousand, five hundred fifty".