206826473681 has 8 divisors (see below), whose sum is σ = 207133578624. Its totient is φ = 206519438160.

The previous prime is 206826473657. The next prime is 206826473687. The reversal of 206826473681 is 186374628602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206826473681 - 2³⁰ = 205752731857 is a prime.

It is a super-2 number, since 2×206826473681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206826473687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10579886 + ... + 10599416.

It is an arithmetic number, because the mean of its divisors is an integer number (25891697328).

Almost surely, 2^206826473681 is an apocalyptic number.

It is an amenable number.

206826473681 is a deficient number, since it is larger than the sum of its proper divisors (307104943).

206826473681 is a wasteful number, since it uses less digits than its factorization.

206826473681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34711.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 206826473681 in words is "two hundred six billion, eight hundred twenty-six million, four hundred seventy-three thousand, six hundred eighty-one".