208710136140 has 96 divisors (see below), whose sum is σ = 643472895744. Its totient is φ = 50123516160.

The previous prime is 208710136111. The next prime is 208710136177. The reversal of 208710136140 is 41631017802.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1407079 + ... + 1548318.

It is an arithmetic number, because the mean of its divisors is an integer number (6702842664).

Almost surely, 2^208710136140 is an apocalyptic number.

208710136140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208710136140 is an abundant number, since it is smaller than the sum of its proper divisors (434762759604).

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

208710136140 is a wasteful number, since it uses less digits than its factorization.

208710136140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955527 (or 2955525 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 208710136140 in words is "two hundred eight billion, seven hundred ten million, one hundred thirty-six thousand, one hundred forty".