2091696805 has 16 divisors (see below), whose sum is σ = 2751213888. Its totient is φ = 1514016000.

The previous prime is 2091696799. The next prime is 2091696857. The reversal of 2091696805 is 5086961902.

It is not a de Polignac number, because 2091696805 - 2²¹ = 2089599653 is a prime.

It is a Duffinian number.

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, 78516 + ... + 101725.

It is an arithmetic number, because the mean of its divisors is an integer number (171950868).

Almost surely, 2^2091696805 is an apocalyptic number.

It is an amenable number.

2091696805 is a deficient number, since it is larger than the sum of its proper divisors (659517083).

2091696805 is a wasteful number, since it uses less digits than its factorization.

2091696805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180468.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 2091696805 is about 45735.0719360974. The cubic root of 2091696805 is about 1278.8891740036.

It can be divided in two parts, 2091 and 696805, that added together give a palindrome (698896).

The spelling of 2091696805 in words is "two billion, ninety-one million, six hundred ninety-six thousand, eight hundred five".