2109075985 has 16 divisors (see below), whose sum is σ = 2553627600. Its totient is φ = 1672160256.

The previous prime is 2109075973. The next prime is 2109076007. The reversal of 2109075985 is 5895709012.

It can be written as a sum of positive squares in 8 ways, for example, as 181602576 + 1927473409 = 13476^2 + 43903^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109075985 - 2¹¹ = 2109073937 is a prime.

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, 317781 + ... + 324349.

It is an arithmetic number, because the mean of its divisors is an integer number (159601725).

Almost surely, 2^2109075985 is an apocalyptic number.

It is an amenable number.

2109075985 is a deficient number, since it is larger than the sum of its proper divisors (444551615).

2109075985 is a wasteful number, since it uses less digits than its factorization.

2109075985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7140.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 2109075985 is about 45924.6772988118. The cubic root of 2109075985 is about 1282.4213576230.

The spelling of 2109075985 in words is "two billion, one hundred nine million, seventy-five thousand, nine hundred eighty-five".