208900644192 has 144 divisors (see below), whose sum is σ = 636937746480. Its totient is φ = 66605856768.

The previous prime is 208900644191. The next prime is 208900644263. The reversal of 208900644192 is 291446009802.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208900644191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228528 + ... + 685584.

It is an arithmetic number, because the mean of its divisors is an integer number (4423178795).

Almost surely, 2^208900644192 is an apocalyptic number.

It is a pronic number, being equal to 457056×457057.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208900644192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318468873240).

208900644192 is an abundant number, since it is smaller than the sum of its proper divisors (428037102288).

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

208900644192 is a wasteful number, since it uses less digits than its factorization.

208900644192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457122 (or 457085 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 208900644192 in words is "two hundred eight billion, nine hundred million, six hundred forty-four thousand, one hundred ninety-two".