2086556865 has 32 divisors (see below), whose sum is σ = 3394106496. Its totient is φ = 1094446080.

The previous prime is 2086556861. The next prime is 2086556867. The reversal of 2086556865 is 5686556802.

It is not a de Polignac number, because 2086556865 - 2² = 2086556861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2086556861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217347 + ... + 226743.

It is an arithmetic number, because the mean of its divisors is an integer number (106065828).

Almost surely, 2^2086556865 is an apocalyptic number.

It is an amenable number.

2086556865 is a deficient number, since it is larger than the sum of its proper divisors (1307549631).

2086556865 is a wasteful number, since it uses less digits than its factorization.

2086556865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9649.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The square root of 2086556865 is about 45678.8448299648. The cubic root of 2086556865 is about 1277.8407739256.

The spelling of 2086556865 in words is "two billion, eighty-six million, five hundred fifty-six thousand, eight hundred sixty-five".