209852529128 has 32 divisors (see below), whose sum is σ = 429282659520. Its totient is φ = 95378880000.

The previous prime is 209852529121. The next prime is 209852529137. The reversal of 209852529128 is 821925258902.

It is a self number, because there is not a number n which added to its sum of digits gives 209852529128.

It is not an unprimeable number, because it can be changed into a prime (209852529121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925853 + ... + 1130003.

It is an arithmetic number, because the mean of its divisors is an integer number (13415083110).

Almost surely, 2^209852529128 is an apocalyptic number.

It is an amenable number.

209852529128 is an abundant number, since it is smaller than the sum of its proper divisors (219430130392).

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

209852529128 is a wasteful number, since it uses less digits than its factorization.

209852529128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215849 (or 215845 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 209852529128 in words is "two hundred nine billion, eight hundred fifty-two million, five hundred twenty-nine thousand, one hundred twenty-eight".