208738741836 has 12 divisors (see below), whose sum is σ = 487057064312. Its totient is φ = 69579580608.

The previous prime is 208738741817. The next prime is 208738741837. The reversal of 208738741836 is 638147837802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (208738741837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8697447565 + ... + 8697447588.

Almost surely, 2^208738741836 is an apocalyptic number.

It is an amenable number.

208738741836 is an abundant number, since it is smaller than the sum of its proper divisors (278318322476).

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

208738741836 is a wasteful number, since it uses less digits than its factorization.

208738741836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17394895160 (or 17394895158 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 208738741836 in words is "two hundred eight billion, seven hundred thirty-eight million, seven hundred forty-one thousand, eight hundred thirty-six".