206815413655 has 8 divisors (see below), whose sum is σ = 248547264912. Its totient is φ = 165206485248.

The previous prime is 206815413653. The next prime is 206815413743. The reversal of 206815413655 is 556314518602.

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 206815413655 - 2¹ = 206815413653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206815413653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30727009 + ... + 30733738.

It is an arithmetic number, because the mean of its divisors is an integer number (31068408114).

Almost surely, 2^206815413655 is an apocalyptic number.

206815413655 is a deficient number, since it is larger than the sum of its proper divisors (41731851257).

206815413655 is an equidigital number, since it uses as much as digits as its factorization.

206815413655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61461425.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 206815413655 in words is "two hundred six billion, eight hundred fifteen million, four hundred thirteen thousand, six hundred fifty-five".