209213427616 has 24 divisors (see below), whose sum is σ = 413133333984. Its totient is φ = 104290676160.

The previous prime is 209213427611. The next prime is 209213427617. The reversal of 209213427616 is 616724312902.

It is not an unprimeable number, because it can be changed into a prime (209213427611) 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, 9865420 + ... + 9886603.

It is an arithmetic number, because the mean of its divisors is an integer number (17213888916).

Almost surely, 2^209213427616 is an apocalyptic number.

It is an amenable number.

209213427616 is a deficient number, since it is larger than the sum of its proper divisors (203919906368).

209213427616 is a wasteful number, since it uses less digits than its factorization.

209213427616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19752364 (or 19752356 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 209213427616 in words is "two hundred nine billion, two hundred thirteen million, four hundred twenty-seven thousand, six hundred sixteen".