209639598422 has 4 divisors (see below), whose sum is σ = 314459397636. Its totient is φ = 104819799210.

The previous prime is 209639598419. The next prime is 209639598431. The reversal of 209639598422 is 224895936902.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×209639598422² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52409899604 + ... + 52409899607.

It is an arithmetic number, because the mean of its divisors is an integer number (78614849409).

Almost surely, 2^209639598422 is an apocalyptic number.

209639598422 is a deficient number, since it is larger than the sum of its proper divisors (104819799214).

209639598422 is a wasteful number, since it uses less digits than its factorization.

209639598422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104819799213.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 209639598422 in words is "two hundred nine billion, six hundred thirty-nine million, five hundred ninety-eight thousand, four hundred twenty-two".