208117751156 has 48 divisors (see below), whose sum is σ = 426180518400. Its totient is φ = 88888736160.

The previous prime is 208117751117. The next prime is 208117751189. The reversal of 208117751156 is 651157711802.

208117751156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 143141 + ... + 660851.

It is an arithmetic number, because the mean of its divisors is an integer number (8878760800).

Almost surely, 2^208117751156 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 208117751156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213090259200).

208117751156 is an abundant number, since it is smaller than the sum of its proper divisors (218062767244).

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

208117751156 is a wasteful number, since it uses less digits than its factorization.

208117751156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518029 (or 518013 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 44.

The spelling of 208117751156 in words is "two hundred eight billion, one hundred seventeen million, seven hundred fifty-one thousand, one hundred fifty-six".