208601016261 has 16 divisors (see below), whose sum is σ = 305927266368. Its totient is φ = 126424855920.

The previous prime is 208601016241. The next prime is 208601016263. The reversal of 208601016261 is 162610106802.

208601016261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 208601016261 - 2³¹ = 206453532613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208601016263) 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 15 ways as a sum of consecutive naturals, for example, 26116846 + ... + 26124831.

It is an arithmetic number, because the mean of its divisors is an integer number (19120454148).

Almost surely, 2^208601016261 is an apocalyptic number.

It is an amenable number.

208601016261 is a deficient number, since it is larger than the sum of its proper divisors (97326250107).

208601016261 is an equidigital number, since it uses as much as digits as its factorization.

208601016261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52241713 (or 52241691 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 208601016261 in words is "two hundred eight billion, six hundred one million, sixteen thousand, two hundred sixty-one".