208931146868 has 24 divisors (see below), whose sum is σ = 366850465800. Its totient is φ = 104117207040.

The previous prime is 208931146849. The next prime is 208931146901. The reversal of 208931146868 is 868641139802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8560320484 + 200370826384 = 92522^2 + 447628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1707380 + ... + 1825652.

It is an arithmetic number, because the mean of its divisors is an integer number (15285436075).

Almost surely, 2^208931146868 is an apocalyptic number.

It is an amenable number.

208931146868 is a deficient number, since it is larger than the sum of its proper divisors (157919318932).

208931146868 is a wasteful number, since it uses less digits than its factorization.

208931146868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119747 (or 119745 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 208931146868 in words is "two hundred eight billion, nine hundred thirty-one million, one hundred forty-six thousand, eight hundred sixty-eight".