208720637130 has 192 divisors, whose sum is σ = 538952561280. Its totient is φ = 51706626048.

The previous prime is 208720637119. The next prime is 208720637161. The reversal of 208720637130 is 31736027802.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77618826 + ... + 77621514.

It is an arithmetic number, because the mean of its divisors is an integer number (2807044590).

Almost surely, 2^208720637130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208720637130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269476280640).

208720637130 is an abundant number, since it is smaller than the sum of its proper divisors (330231924150).

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

208720637130 is a wasteful number, since it uses less digits than its factorization.

208720637130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 208720637130 in words is "two hundred eight billion, seven hundred twenty million, six hundred thirty-seven thousand, one hundred thirty".