256506101177 has 2 divisors, whose sum is σ = 256506101178. Its totient is φ = 256506101176.

The previous prime is 256506101143. The next prime is 256506101239. The reversal of 256506101177 is 771101605652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186223319296 + 70282781881 = 431536^2 + 265109^2 .

It is a cyclic number.

It is not a de Polignac number, because 256506101177 - 2¹⁶ = 256506035641 is a prime.

It is not a weakly prime, because it can be changed into another prime (256506101777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128253050588 + 128253050589.

It is an arithmetic number, because the mean of its divisors is an integer number (128253050589).

Almost surely, 2^256506101177 is an apocalyptic number.

It is an amenable number.

256506101177 is a deficient number, since it is larger than the sum of its proper divisors (1).

256506101177 is an equidigital number, since it uses as much as digits as its factorization.

256506101177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 256506101177 in words is "two hundred fifty-six billion, five hundred six million, one hundred one thousand, one hundred seventy-seven".