208630863792 has 120 divisors (see below), whose sum is σ = 630408870000. Its totient is φ = 64028865024.

The previous prime is 208630863769. The next prime is 208630863811. The reversal of 208630863792 is 297368036802.

It is a happy number.

208630863792 is a `hidden beast` number, since 208 + 6 + 308 + 63 + 79 + 2 = 666.

208630863792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 584959 + ... + 871457.

It is an arithmetic number, because the mean of its divisors is an integer number (5253407250).

Almost surely, 2^208630863792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208630863792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315204435000).

208630863792 is an abundant number, since it is smaller than the sum of its proper divisors (421778006208).

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

208630863792 is a wasteful number, since it uses less digits than its factorization.

208630863792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286915 (or 286906 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 208630863792 in words is "two hundred eight billion, six hundred thirty million, eight hundred sixty-three thousand, seven hundred ninety-two".