1165385806 has 24 divisors (see below), whose sum is σ = 1921179384. Its totient is φ = 529832160.

The previous prime is 1165385779. The next prime is 1165385849. The reversal of 1165385806 is 6085835611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3085 + ... + 48376.

It is an arithmetic number, because the mean of its divisors is an integer number (80049141).

Almost surely, 2^1165385806 is an apocalyptic number.

1165385806 is a deficient number, since it is larger than the sum of its proper divisors (755793578).

1165385806 is a wasteful number, since it uses less digits than its factorization.

1165385806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51556 (or 51543 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 1165385806 is about 34137.7475238188. The cubic root of 1165385806 is about 1052.3412025081.

The spelling of 1165385806 in words is "one billion, one hundred sixty-five million, three hundred eighty-five thousand, eight hundred six".