256061011 has 2 divisors, whose sum is σ = 256061012. Its totient is φ = 256061010.

The previous prime is 256060991. The next prime is 256061063. The reversal of 256061011 is 110160652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256061011 - 2²¹ = 253963859 is a prime.

It is not a weakly prime, because it can be changed into another prime (256061411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128030505 + 128030506.

It is an arithmetic number, because the mean of its divisors is an integer number (128030506).

Almost surely, 2^256061011 is an apocalyptic number.

256061011 is a deficient number, since it is larger than the sum of its proper divisors (1).

256061011 is an equidigital number, since it uses as much as digits as its factorization.

256061011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 256061011 is about 16001.9064801667. The cubic root of 256061011 is about 635.0108589294.

The spelling of 256061011 in words is "two hundred fifty-six million, sixty-one thousand, eleven".