256083861 has 8 divisors (see below), whose sum is σ = 372485664. Its totient is φ = 155202320.

The previous prime is 256083859. The next prime is 256083899. The reversal of 256083861 is 168380652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256083861 - 2¹ = 256083859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256083661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3880026 + ... + 3880091.

It is an arithmetic number, because the mean of its divisors is an integer number (46560708).

Almost surely, 2^256083861 is an apocalyptic number.

It is an amenable number.

256083861 is a deficient number, since it is larger than the sum of its proper divisors (116401803).

256083861 is a wasteful number, since it uses less digits than its factorization.

256083861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7760131.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 256083861 is about 16002.6204416652. The cubic root of 256083861 is about 635.0297470926.

The spelling of 256083861 in words is "two hundred fifty-six million, eighty-three thousand, eight hundred sixty-one".