206911023989761 has 16 divisors (see below), whose sum is σ = 254661007156864. Its totient is φ = 163708994899584.

The previous prime is 206911023989741. The next prime is 206911023989809. The reversal of 206911023989761 is 167989320119602.

It is a cyclic number.

It is not a de Polignac number, because 206911023989761 - 2⁷ = 206911023989633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206911023989693 and 206911023989702.

It is not an unprimeable number, because it can be changed into a prime (206911023989741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12715030 + ... + 23989456.

It is an arithmetic number, because the mean of its divisors is an integer number (15916312947304).

Almost surely, 2^{206911023989761} is an apocalyptic number.

It is an amenable number.

206911023989761 is a deficient number, since it is larger than the sum of its proper divisors (47749983167103).

206911023989761 is a wasteful number, since it uses less digits than its factorization.

206911023989761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476120.

The product of its (nonzero) digits is 17635968, while the sum is 64.

The spelling of 206911023989761 in words is "two hundred six trillion, nine hundred eleven billion, twenty-three million, nine hundred eighty-nine thousand, seven hundred sixty-one".