1085871566 has 32 divisors (see below), whose sum is σ = 1864060128. Its totient is φ = 469969920.

The previous prime is 1085871557. The next prime is 1085871599. The reversal of 1085871566 is 6651785801.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1085871566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120746 + ... + 129426.

It is an arithmetic number, because the mean of its divisors is an integer number (58251879).

Almost surely, 2^1085871566 is an apocalyptic number.

1085871566 is a deficient number, since it is larger than the sum of its proper divisors (778188562).

1085871566 is a wasteful number, since it uses less digits than its factorization.

1085871566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8996.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 1085871566 is about 32952.5653933044. The cubic root of 1085871566 is about 1027.8415117749.

The spelling of 1085871566 in words is "one billion, eighty-five million, eight hundred seventy-one thousand, five hundred sixty-six".