209030945856 has 56 divisors (see below), whose sum is σ = 553424957664. Its totient is φ = 69631134720.

The previous prime is 209030945831. The next prime is 209030945869. The reversal of 209030945856 is 658549030902.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 209030945799 and 209030945808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65005 + ... + 649836.

Almost surely, 2^209030945856 is an apocalyptic number.

It is an amenable number.

209030945856 is an abundant number, since it is smaller than the sum of its proper divisors (344394011808).

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

209030945856 is a wasteful number, since it uses less digits than its factorization.

209030945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716379 (or 716369 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 209030945856 in words is "two hundred nine billion, thirty million, nine hundred forty-five thousand, eight hundred fifty-six".