256068013 has 8 divisors (see below), whose sum is σ = 262009728. Its totient is φ = 250192224.

The previous prime is 256067989. The next prime is 256068019. The reversal of 256068013 is 310860652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256068013 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 (256068019) 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, 8581 + ... + 24202.

It is an arithmetic number, because the mean of its divisors is an integer number (32751216).

Almost surely, 2^256068013 is an apocalyptic number.

It is an amenable number.

256068013 is a deficient number, since it is larger than the sum of its proper divisors (5941715).

256068013 is a wasteful number, since it uses less digits than its factorization.

256068013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32963.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 256068013 is about 16002.1252651015. The cubic root of 256068013 is about 635.0166470102.

The spelling of 256068013 in words is "two hundred fifty-six million, sixty-eight thousand, thirteen".