1840806065 has 16 divisors (see below), whose sum is σ = 2548132992. Its totient is φ = 1250467584.

The previous prime is 1840806031. The next prime is 1840806067. The reversal of 1840806065 is 5606080481.

It is a cyclic number.

It is not a de Polignac number, because 1840806065 - 2¹⁶ = 1840740529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840806067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242024 + ... + 249513.

It is an arithmetic number, because the mean of its divisors is an integer number (159258312).

Almost surely, 2^1840806065 is an apocalyptic number.

It is an amenable number.

1840806065 is a deficient number, since it is larger than the sum of its proper divisors (707326927).

1840806065 is a wasteful number, since it uses less digits than its factorization.

1840806065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491656.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1840806065 is about 42904.6158938639. The cubic root of 1840806065 is about 1225.5640473406.

The spelling of 1840806065 in words is "one billion, eight hundred forty million, eight hundred six thousand, sixty-five".