208871092854 has 16 divisors (see below), whose sum is σ = 464157984240. Its totient is φ = 69623697600.

The previous prime is 208871092823. The next prime is 208871092861. The reversal of 208871092854 is 458290178802.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 3867983201 = 208871092854 / (2 + 0 + 8 + 8 + 7 + 1 + 0 + 9 + 2 + 8 + 5 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 208871092854.

It is a congruent 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, 1933991547 + ... + 1933991654.

It is an arithmetic number, because the mean of its divisors is an integer number (29009874015).

Almost surely, 2^208871092854 is an apocalyptic number.

208871092854 is an abundant number, since it is smaller than the sum of its proper divisors (255286891386).

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

208871092854 is a wasteful number, since it uses less digits than its factorization.

208871092854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867983212 (or 3867983206 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 208871092854 in words is "two hundred eight billion, eight hundred seventy-one million, ninety-two thousand, eight hundred fifty-four".