208957349984 has 12 divisors (see below), whose sum is σ = 411384782844. Its totient is φ = 104478674976.

The previous prime is 208957349917. The next prime is 208957349989. The reversal of 208957349984 is 489943759802.

It is a happy number.

208957349984 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 2×208957349984² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208957349989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3264958562 + ... + 3264958625.

It is an arithmetic number, because the mean of its divisors is an integer number (34282065237).

Almost surely, 2^208957349984 is an apocalyptic number.

It is an amenable number.

208957349984 is a deficient number, since it is larger than the sum of its proper divisors (202427432860).

208957349984 is an equidigital number, since it uses as much as digits as its factorization.

208957349984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529917197 (or 6529917189 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 208957349984 in words is "two hundred eight billion, nine hundred fifty-seven million, three hundred forty-nine thousand, nine hundred eighty-four".