206813793764531 has 2 divisors, whose sum is σ = 206813793764532. Its totient is φ = 206813793764530.

The previous prime is 206813793764467. The next prime is 206813793764561. The reversal of 206813793764531 is 135467397318602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206813793764531 - 2⁶ = 206813793764467 is a prime.

It is a super-2 number, since 2×206813793764531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206813793764561) 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, 103406896882265 + 103406896882266.

It is an arithmetic number, because the mean of its divisors is an integer number (103406896882266).

It is a 2-persistent number, because it is pandigital, and so is 2⋅206813793764531 = 413627587529062, but 3⋅206813793764531 = 620441381293593 is not.

Almost surely, 2^{206813793764531} is an apocalyptic number.

206813793764531 is a deficient number, since it is larger than the sum of its proper divisors (1).

206813793764531 is an equidigital number, since it uses as much as digits as its factorization.

206813793764531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137168640, while the sum is 65.

The spelling of 206813793764531 in words is "two hundred six trillion, eight hundred thirteen billion, seven hundred ninety-three million, seven hundred sixty-four thousand, five hundred thirty-one".