208944143161 has 4 divisors (see below), whose sum is σ = 225016769572. Its totient is φ = 192871516752.

The previous prime is 208944143101. The next prime is 208944143189. The reversal of 208944143161 is 161341449802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95926478400 + 113017664761 = 309720^2 + 336181^2 .

It is a cyclic number.

It is not a de Polignac number, because 208944143161 - 2¹³ = 208944134969 is a prime.

It is a super-2 number, since 2×208944143161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208944143101) 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 3 ways as a sum of consecutive naturals, for example, 8036313186 + ... + 8036313211.

It is an arithmetic number, because the mean of its divisors is an integer number (56254192393).

Almost surely, 2^208944143161 is an apocalyptic number.

It is an amenable number.

208944143161 is a deficient number, since it is larger than the sum of its proper divisors (16072626411).

208944143161 is a wasteful number, since it uses less digits than its factorization.

208944143161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16072626410.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 208944143161 in words is "two hundred eight billion, nine hundred forty-four million, one hundred forty-three thousand, one hundred sixty-one".