206220571661603 has 8 divisors (see below), whose sum is σ = 212876464375680. Its totient is φ = 199564904960640.

The previous prime is 206220571661593. The next prime is 206220571661617. The reversal of 206220571661603 is 306166175022602.

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 206220571661603 - 2³⁶ = 206151852184867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206220511661603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54648008 + ... + 58299621.

It is an arithmetic number, because the mean of its divisors is an integer number (26609558046960).

Almost surely, 2^{206220571661603} is an apocalyptic number.

206220571661603 is a deficient number, since it is larger than the sum of its proper divisors (6655892714077).

206220571661603 is a wasteful number, since it uses less digits than its factorization.

206220571661603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113006557.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 206220571661603 in words is "two hundred six trillion, two hundred twenty billion, five hundred seventy-one million, six hundred sixty-one thousand, six hundred three".