206608776431 has 2 divisors, whose sum is σ = 206608776432. Its totient is φ = 206608776430.

The previous prime is 206608776419. The next prime is 206608776499. The reversal of 206608776431 is 134677806602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206608776431 - 2¹⁴ = 206608760047 is a prime.

It is a super-2 number, since 2×206608776431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206608776431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206608776631) 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, 103304388215 + 103304388216.

It is an arithmetic number, because the mean of its divisors is an integer number (103304388216).

Almost surely, 2^206608776431 is an apocalyptic number.

206608776431 is a deficient number, since it is larger than the sum of its proper divisors (1).

206608776431 is an equidigital number, since it uses as much as digits as its factorization.

206608776431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 206608776431 in words is "two hundred six billion, six hundred eight million, seven hundred seventy-six thousand, four hundred thirty-one".