209453037850 has 48 divisors (see below), whose sum is σ = 445311373248. Its totient is φ = 71800525440.

The previous prime is 209453037847. The next prime is 209453037901. The reversal of 209453037850 is 58730354902.

209453037850 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 209453037850.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2202894 + ... + 2296006.

It is an arithmetic number, because the mean of its divisors is an integer number (9277320276).

Almost surely, 2^209453037850 is an apocalyptic number.

209453037850 is an abundant number, since it is smaller than the sum of its proper divisors (235858335398).

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

209453037850 is a wasteful number, since it uses less digits than its factorization.

209453037850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99559 (or 99554 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 209453037850 in words is "two hundred nine billion, four hundred fifty-three million, thirty-seven thousand, eight hundred fifty".