2659690256 has 20 divisors (see below), whose sum is σ = 5456276892. Its totient is φ = 1251618816.

The previous prime is 2659690207. The next prime is 2659690279. The reversal of 2659690256 is 6520969562.

It can be written as a sum of positive squares in 2 ways, for example, as 2498400256 + 161290000 = 49984^2 + 12700^2 .

It is a super-2 number, since 2×2659690256² = 14147904515722691072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4888865 + ... + 4889408.

Almost surely, 2^2659690256 is an apocalyptic number.

It is an amenable number.

2659690256 is an abundant number, since it is smaller than the sum of its proper divisors (2796586636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2659690256 is a wasteful number, since it uses less digits than its factorization.

2659690256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9778298 (or 9778292 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 50.

The square root of 2659690256 is about 51572.1849062070. The cubic root of 2659690256 is about 1385.5121993525.

The spelling of 2659690256 in words is "two billion, six hundred fifty-nine million, six hundred ninety thousand, two hundred fifty-six".