1081639166 has 8 divisors (see below), whose sum is σ = 1674796224. Its totient is φ = 523373760.

The previous prime is 1081639159. The next prime is 1081639171. The reversal of 1081639166 is 6619361801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 8722835 + ... + 8722958.

It is an arithmetic number, because the mean of its divisors is an integer number (209349528).

Almost surely, 2^1081639166 is an apocalyptic number.

1081639166 is a deficient number, since it is larger than the sum of its proper divisors (593157058).

1081639166 is a wasteful number, since it uses less digits than its factorization.

1081639166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17445826.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1081639166 is about 32888.2831111629. The cubic root of 1081639166 is about 1026.5043675577.

The spelling of 1081639166 in words is "one billion, eighty-one million, six hundred thirty-nine thousand, one hundred sixty-six".