256683315080587 has 2 divisors, whose sum is σ = 256683315080588. Its totient is φ = 256683315080586.

The previous prime is 256683315080503. The next prime is 256683315080593. The reversal of 256683315080587 is 785080513386652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256683315080587 - 2¹⁹ = 256683314556299 is a prime.

It is not a weakly prime, because it can be changed into another prime (256683315084587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128341657540293 + 128341657540294.

It is an arithmetic number, because the mean of its divisors is an integer number (128341657540294).

Almost surely, 2^{256683315080587} is an apocalyptic number.

256683315080587 is a deficient number, since it is larger than the sum of its proper divisors (1).

256683315080587 is an equidigital number, since it uses as much as digits as its factorization.

256683315080587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304000, while the sum is 67.

The spelling of 256683315080587 in words is "two hundred fifty-six trillion, six hundred eighty-three billion, three hundred fifteen million, eighty thousand, five hundred eighty-seven".