256501716 has 12 divisors (see below), whose sum is σ = 598504032. Its totient is φ = 85500568.

The previous prime is 256501709. The next prime is 256501717. The reversal of 256501716 is 617105652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256501717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10687560 + ... + 10687583.

It is an arithmetic number, because the mean of its divisors is an integer number (49875336).

Almost surely, 2^256501716 is an apocalyptic number.

It is an amenable number.

256501716 is an abundant number, since it is smaller than the sum of its proper divisors (342002316).

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

256501716 is a wasteful number, since it uses less digits than its factorization.

256501716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21375150 (or 21375148 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 256501716 is about 16015.6709506658. The cubic root of 256501716 is about 635.3749545304.

The spelling of 256501716 in words is "two hundred fifty-six million, five hundred one thousand, seven hundred sixteen".