209345355730 has 128 divisors (see below), whose sum is σ = 475163366400. Its totient is φ = 64746479616.

The previous prime is 209345355691. The next prime is 209345355743. The reversal of 209345355730 is 37553543902.

209345355730 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4705731 + ... + 4750009.

It is an arithmetic number, because the mean of its divisors is an integer number (3712213800).

Almost surely, 2^209345355730 is an apocalyptic number.

209345355730 is an abundant number, since it is smaller than the sum of its proper divisors (265818010670).

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

209345355730 is a wasteful number, since it uses less digits than its factorization.

209345355730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44476.

The product of its (nonzero) digits is 1701000, while the sum is 46.

The spelling of 209345355730 in words is "two hundred nine billion, three hundred forty-five million, three hundred fifty-five thousand, seven hundred thirty".