256116709 has 16 divisors (see below), whose sum is σ = 267595776. Its totient is φ = 244944000.

The previous prime is 256116673. The next prime is 256116727. The reversal of 256116709 is 907611652.

256116709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256116709 - 2¹⁷ = 255985637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256116739) 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, 525664 + ... + 526150.

It is an arithmetic number, because the mean of its divisors is an integer number (16724736).

Almost surely, 2^256116709 is an apocalyptic number.

It is an amenable number.

256116709 is a deficient number, since it is larger than the sum of its proper divisors (11479067).

256116709 is a wasteful number, since it uses less digits than its factorization.

256116709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 256116709 is about 16003.6467406651. The cubic root of 256116709 is about 635.0568977888.

The spelling of 256116709 in words is "two hundred fifty-six million, one hundred sixteen thousand, seven hundred nine".