206013272561 has 8 divisors (see below), whose sum is σ = 226284601920. Its totient is φ = 186684795792.

The previous prime is 206013272557. The next prime is 206013272581. The reversal of 206013272561 is 165272310602.

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

It is not a de Polignac number, because 206013272561 - 2² = 206013272557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206013272551) 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 in 7 ways as a sum of consecutive naturals, for example, 235712690 + ... + 235713563.

It is an arithmetic number, because the mean of its divisors is an integer number (28285575240).

Almost surely, 2^206013272561 is an apocalyptic number.

It is an amenable number.

206013272561 is a deficient number, since it is larger than the sum of its proper divisors (20271329359).

206013272561 is a wasteful number, since it uses less digits than its factorization.

206013272561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471426295.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 206013272561 in words is "two hundred six billion, thirteen million, two hundred seventy-two thousand, five hundred sixty-one".