2091560685 has 16 divisors (see below), whose sum is σ = 3353495040. Its totient is φ = 1113166400.

The previous prime is 2091560659. The next prime is 2091560687. The reversal of 2091560685 is 5860651902.

It is not a de Polignac number, because 2091560685 - 2¹⁵ = 2091527917 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091560687) 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, 138366 + ... + 152735.

It is an arithmetic number, because the mean of its divisors is an integer number (209593440).

Almost surely, 2^2091560685 is an apocalyptic number.

It is an amenable number.

2091560685 is a deficient number, since it is larger than the sum of its proper divisors (1261934355).

2091560685 is a wasteful number, since it uses less digits than its factorization.

2091560685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291588.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 2091560685 is about 45733.5837760392. The cubic root of 2091560685 is about 1278.8614315873.

The spelling of 2091560685 in words is "two billion, ninety-one million, five hundred sixty thousand, six hundred eighty-five".