208712267528 has 12 divisors (see below), whose sum is σ = 391337924445. Its totient is φ = 104355487680.

The previous prime is 208712267527. The next prime is 208712267537. The reversal of 208712267528 is 825762217802.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 143912492164 + 64799775364 = 379358^2 + 254558^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=323042.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208712267527) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1211408 + ... + 1372928.

Almost surely, 2^208712267528 is an apocalyptic number.

It is an amenable number.

208712267528 is a deficient number, since it is larger than the sum of its proper divisors (182625656917).

208712267528 is an frugal number, since it uses more digits than its factorization.

208712267528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323048 (or 161523 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

Multiplying 208712267528 by its sum of digits (50), we get a square (10435613376400 = 3230420²).

The spelling of 208712267528 in words is "two hundred eight billion, seven hundred twelve million, two hundred sixty-seven thousand, five hundred twenty-eight".