208667789021872 has 60 divisors (see below), whose sum is σ = 429528863386336. Its totient is φ = 98184239078400.

The previous prime is 208667789021771. The next prime is 208667789021891. The reversal of 208667789021872 is 278120987766802.

It is a junction number, because it is equal to n+sod(n) for n = 208667789021795 and 208667789021804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33927598 + ... + 39603250.

Almost surely, 2^{208667789021872} 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 208667789021872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214764431693168).

208667789021872 is an abundant number, since it is smaller than the sum of its proper divisors (220861074364464).

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

208667789021872 is a wasteful number, since it uses less digits than its factorization.

208667789021872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683646 (or 5683623 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 73.

The spelling of 208667789021872 in words is "two hundred eight trillion, six hundred sixty-seven billion, seven hundred eighty-nine million, twenty-one thousand, eight hundred seventy-two".