206554661013 has 8 divisors (see below), whose sum is σ = 276003626976. Its totient is φ = 137404401200.

The previous prime is 206554660999. The next prime is 206554661017. The reversal of 206554661013 is 310166455602.

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 206554661013 - 2⁸ = 206554660757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206554661017) 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, 74674923 + ... + 74677688.

It is an arithmetic number, because the mean of its divisors is an integer number (34500453372).

Almost surely, 2^206554661013 is an apocalyptic number.

It is an amenable number.

206554661013 is a deficient number, since it is larger than the sum of its proper divisors (69448965963).

206554661013 is a wasteful number, since it uses less digits than its factorization.

206554661013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149353075.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 206554661013 in words is "two hundred six billion, five hundred fifty-four million, six hundred sixty-one thousand, thirteen".