206765309473 has 2 divisors, whose sum is σ = 206765309474. Its totient is φ = 206765309472.

The previous prime is 206765309461. The next prime is 206765309551. The reversal of 206765309473 is 374903567602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187157468689 + 19607840784 = 432617^2 + 140028^2 .

It is a cyclic number.

It is not a de Polignac number, because 206765309473 - 2²⁹ = 206228438561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206765309473.

It is not a weakly prime, because it can be changed into another prime (206765300473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103382654736 + 103382654737.

It is an arithmetic number, because the mean of its divisors is an integer number (103382654737).

Almost surely, 2^206765309473 is an apocalyptic number.

It is an amenable number.

206765309473 is a deficient number, since it is larger than the sum of its proper divisors (1).

206765309473 is an equidigital number, since it uses as much as digits as its factorization.

206765309473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 52.

The spelling of 206765309473 in words is "two hundred six billion, seven hundred sixty-five million, three hundred nine thousand, four hundred seventy-three".