208822412574721 has 9 divisors (see below), whose sum is σ = 229532248048033. Its totient is φ = 189838412379220.

The previous prime is 208822412574703. The next prime is 208822412574761. The reversal of 208822412574721 is 127475214228802.

The square root of 208822412574721 is 14450689.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-208822412574721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208822412574701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 158300730 + ... + 159614428.

Almost surely, 2^{208822412574721} is an apocalyptic number.

208822412574721 is the 14450689-th square number.

208822412574721 is the 7225345-th centered octagonal number.

It is an amenable number.

208822412574721 is a deficient number, since it is larger than the sum of its proper divisors (20709835473312).

208822412574721 is an frugal number, since it uses more digits than its factorization.

208822412574721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627420 (or 1313710 counting only the distinct ones).

The product of its (nonzero) digits is 8028160, while the sum is 55.

The spelling of 208822412574721 in words is "two hundred eight trillion, eight hundred twenty-two billion, four hundred twelve million, five hundred seventy-four thousand, seven hundred twenty-one".