256383027787 has 2 divisors, whose sum is σ = 256383027788. Its totient is φ = 256383027786.

The previous prime is 256383027713. The next prime is 256383027799. The reversal of 256383027787 is 787720383652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256383027787 - 2³⁵ = 222023289419 is a prime.

It is a super-2 number, since 2×256383027787² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256383007787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128191513893 + 128191513894.

It is an arithmetic number, because the mean of its divisors is an integer number (128191513894).

Almost surely, 2^256383027787 is an apocalyptic number.

256383027787 is a deficient number, since it is larger than the sum of its proper divisors (1).

256383027787 is an equidigital number, since it uses as much as digits as its factorization.

256383027787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 58.

The spelling of 256383027787 in words is "two hundred fifty-six billion, three hundred eighty-three million, twenty-seven thousand, seven hundred eighty-seven".