208123739630 has 16 divisors (see below), whose sum is σ = 374645799504. Its totient is φ = 83244369600.

The previous prime is 208123739573. The next prime is 208123739641. The reversal of 208123739630 is 36937321802.

It is a Curzon number.

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, 468047 + ... + 797066.

It is an arithmetic number, because the mean of its divisors is an integer number (23415362469).

Almost surely, 2^208123739630 is an apocalyptic number.

208123739630 is a deficient number, since it is larger than the sum of its proper divisors (166522059874).

208123739630 is a wasteful number, since it uses less digits than its factorization.

208123739630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281571.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 208123739630 in words is "two hundred eight billion, one hundred twenty-three million, seven hundred thirty-nine thousand, six hundred thirty".