2006256509 has 8 divisors (see below), whose sum is σ = 2046446400. Its totient is φ = 1966368096.

The previous prime is 2006256503. The next prime is 2006256521. The reversal of 2006256509 is 9056526002.

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 2006256509 - 2⁸ = 2006256253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006256503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61904 + ... + 88569.

It is an arithmetic number, because the mean of its divisors is an integer number (255805800).

Almost surely, 2^2006256509 is an apocalyptic number.

It is an amenable number.

2006256509 is a deficient number, since it is larger than the sum of its proper divisors (40189891).

2006256509 is a wasteful number, since it uses less digits than its factorization.

2006256509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150739.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 2006256509 is about 44791.2548272539. The cubic root of 2006256509 is about 1261.2334668846.

The spelling of 2006256509 in words is "two billion, six million, two hundred fifty-six thousand, five hundred nine".