209413642008 has 64 divisors (see below), whose sum is σ = 551415312000. Its totient is φ = 66091410432.

The previous prime is 209413642003. The next prime is 209413642019. The reversal of 209413642008 is 800246314902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209413642003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638523 + ... + 909141.

It is an arithmetic number, because the mean of its divisors is an integer number (8615864250).

Almost surely, 2^209413642008 is an apocalyptic number.

It is an amenable number.

209413642008 is an abundant number, since it is smaller than the sum of its proper divisors (342001669992).

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

209413642008 is a wasteful number, since it uses less digits than its factorization.

209413642008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272344 (or 272340 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 209413642008 in words is "two hundred nine billion, four hundred thirteen million, six hundred forty-two thousand, eight".