208139010894 has 12 divisors (see below), whose sum is σ = 450967856976. Its totient is φ = 69379670292.

The previous prime is 208139010887. The next prime is 208139010923. The reversal of 208139010894 is 498010931802.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 5781639174 + ... + 5781639209.

It is an arithmetic number, because the mean of its divisors is an integer number (37580654748).

Almost surely, 2^208139010894 is an apocalyptic number.

208139010894 is an abundant number, since it is smaller than the sum of its proper divisors (242828846082).

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

208139010894 is a wasteful number, since it uses less digits than its factorization.

208139010894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563278391 (or 11563278388 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 208139010894 in words is "two hundred eight billion, one hundred thirty-nine million, ten thousand, eight hundred ninety-four".