206145629726317 has 2 divisors, whose sum is σ = 206145629726318. Its totient is φ = 206145629726316.

The previous prime is 206145629726279. The next prime is 206145629726471. The reversal of 206145629726317 is 713627926541602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156006569887081 + 50139059839236 = 12490259^2 + 7080894^2 .

It is a cyclic number.

It is not a de Polignac number, because 206145629726317 - 2²³ = 206145621337709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206145629729317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103072814863158 + 103072814863159.

It is an arithmetic number, because the mean of its divisors is an integer number (103072814863159).

Almost surely, 2^{206145629726317} is an apocalyptic number.

It is an amenable number.

206145629726317 is a deficient number, since it is larger than the sum of its proper divisors (1).

206145629726317 is an equidigital number, since it uses as much as digits as its factorization.

206145629726317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 206145629726317 in words is "two hundred six trillion, one hundred forty-five billion, six hundred twenty-nine million, seven hundred twenty-six thousand, three hundred seventeen".