208378894556 has 24 divisors (see below), whose sum is σ = 418487088096. Its totient is φ = 88934676480.

The previous prime is 208378894543. The next prime is 208378894627. The reversal of 208378894556 is 655498873802.

It is a junction number, because it is equal to n+sod(n) for n = 208378894492 and 208378894501.

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, 15433301 + ... + 15446796.

It is an arithmetic number, because the mean of its divisors is an integer number (17436962004).

Almost surely, 2^208378894556 is an apocalyptic number.

It is an amenable number.

208378894556 is an abundant number, since it is smaller than the sum of its proper divisors (210108193540).

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

208378894556 is a wasteful number, since it uses less digits than its factorization.

208378894556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30880349 (or 30880347 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 65.

The spelling of 208378894556 in words is "two hundred eight billion, three hundred seventy-eight million, eight hundred ninety-four thousand, five hundred fifty-six".