208449261856 has 24 divisors (see below), whose sum is σ = 447692165424. Its totient is φ = 94749664320.

The previous prime is 208449261827. The next prime is 208449261863. The reversal of 208449261856 is 658162944802.

208449261856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208449261856² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208449261797 and 208449261806.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296092350 + ... + 296093053.

It is an arithmetic number, because the mean of its divisors is an integer number (18653840226).

Almost surely, 2^208449261856 is an apocalyptic number.

It is an amenable number.

208449261856 is an abundant number, since it is smaller than the sum of its proper divisors (239242903568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208449261856 is a wasteful number, since it uses less digits than its factorization.

208449261856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592185424 (or 592185416 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 208449261856 in words is "two hundred eight billion, four hundred forty-nine million, two hundred sixty-one thousand, eight hundred fifty-six".