208142680178 has 16 divisors (see below), whose sum is σ = 319738347456. Its totient is φ = 101567224080.

The previous prime is 208142680147. The next prime is 208142680201. The reversal of 208142680178 is 871086241802.

It is a super-2 number, since 2×208142680178² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 893318 + ... + 1101953.

It is an arithmetic number, because the mean of its divisors is an integer number (19983646716).

Almost surely, 2^208142680178 is an apocalyptic number.

208142680178 is a deficient number, since it is larger than the sum of its proper divisors (111595667278).

208142680178 is a wasteful number, since it uses less digits than its factorization.

208142680178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996529.

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 208142680178 in words is "two hundred eight billion, one hundred forty-two million, six hundred eighty thousand, one hundred seventy-eight".