2091395785 has 16 divisors (see below), whose sum is σ = 2540419200. Its totient is φ = 1652711296.

The previous prime is 2091395783. The next prime is 2091395843. The reversal of 2091395785 is 5875931902.

It is a cyclic number.

It is not a de Polignac number, because 2091395785 - 2¹ = 2091395783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2091395783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186621 + ... + 197509.

It is an arithmetic number, because the mean of its divisors is an integer number (158776200).

Almost surely, 2^2091395785 is an apocalyptic number.

It is an amenable number.

2091395785 is a deficient number, since it is larger than the sum of its proper divisors (449023415).

2091395785 is a wasteful number, since it uses less digits than its factorization.

2091395785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 2091395785 is about 45731.7809078107. The cubic root of 2091395785 is about 1278.8278219493.

The spelling of 2091395785 in words is "two billion, ninety-one million, three hundred ninety-five thousand, seven hundred eighty-five".