256061013 has 16 divisors (see below), whose sum is σ = 369593280. Its totient is φ = 156754944.

The previous prime is 256061011. The next prime is 256061063. The reversal of 256061013 is 310160652.

It is not a de Polignac number, because 256061013 - 2¹ = 256061011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256061011) 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, 9483 + ... + 24536.

It is an arithmetic number, because the mean of its divisors is an integer number (23099580).

Almost surely, 2^256061013 is an apocalyptic number.

It is an amenable number.

256061013 is a deficient number, since it is larger than the sum of its proper divisors (113532267).

256061013 is a wasteful number, since it uses less digits than its factorization.

256061013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34228.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 256061013 is about 16001.9065426592. The cubic root of 256061013 is about 635.0108605826.

The spelling of 256061013 in words is "two hundred fifty-six million, sixty-one thousand, thirteen".