206255855779 has 2 divisors, whose sum is σ = 206255855780. Its totient is φ = 206255855778.

The previous prime is 206255855671. The next prime is 206255855807. The reversal of 206255855779 is 977558552602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206255855779 - 2¹⁷ = 206255724707 is a prime.

It is not a weakly prime, because it can be changed into another prime (206255955779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103127927889 + 103127927890.

It is an arithmetic number, because the mean of its divisors is an integer number (103127927890).

Almost surely, 2^206255855779 is an apocalyptic number.

206255855779 is a deficient number, since it is larger than the sum of its proper divisors (1).

206255855779 is an equidigital number, since it uses as much as digits as its factorization.

206255855779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920000, while the sum is 61.

The spelling of 206255855779 in words is "two hundred six billion, two hundred fifty-five million, eight hundred fifty-five thousand, seven hundred seventy-nine".