206688284128401 has 8 divisors (see below), whose sum is σ = 276656691597024. Its totient is φ = 137256033039360.

The previous prime is 206688284128399. The next prime is 206688284128409. The reversal of 206688284128401 is 104821482886602.

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

It is not a de Polignac number, because 206688284128401 - 2¹ = 206688284128399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206688284128409) 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, 134039093995 + ... + 134039095536.

It is an arithmetic number, because the mean of its divisors is an integer number (34582086449628).

Almost surely, 2^{206688284128401} is an apocalyptic number.

It is an amenable number.

206688284128401 is a deficient number, since it is larger than the sum of its proper divisors (69968407468623).

206688284128401 is a wasteful number, since it uses less digits than its factorization.

206688284128401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268078189791.

The product of its (nonzero) digits is 18874368, while the sum is 60.

The spelling of 206688284128401 in words is "two hundred six trillion, six hundred eighty-eight billion, two hundred eighty-four million, one hundred twenty-eight thousand, four hundred one".