2656590085 has 16 divisors (see below), whose sum is σ = 3421678896. Its totient is φ = 1972850688.

The previous prime is 2656590059. The next prime is 2656590149. The reversal of 2656590085 is 5800956562.

It can be written as a sum of positive squares in 8 ways, for example, as 13704804 + 2642885281 = 3702^2 + 51409^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656590085 - 2¹⁵ = 2656557317 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, 207864 + ... + 220273.

It is an arithmetic number, because the mean of its divisors is an integer number (213854931).

Almost surely, 2^2656590085 is an apocalyptic number.

It is an amenable number.

2656590085 is a deficient number, since it is larger than the sum of its proper divisors (765088811).

2656590085 is a wasteful number, since it uses less digits than its factorization.

2656590085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428232.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 2656590085 is about 51542.1195237448. The cubic root of 2656590085 is about 1384.9736661269.

The spelling of 2656590085 in words is "two billion, six hundred fifty-six million, five hundred ninety thousand, eighty-five".