210500650009 has 16 divisors (see below), whose sum is σ = 246515140368. Its totient is φ = 177935726592.

The previous prime is 210500650007. The next prime is 210500650037. The reversal of 210500650009 is 900056005012.

It can be written as a sum of positive squares in 8 ways, for example, as 28830342025 + 181670307984 = 169795^2 + 426228^2 .

It is not a de Polignac number, because 210500650009 - 2¹ = 210500650007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210500650007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12863332 + ... + 12879685.

It is an arithmetic number, because the mean of its divisors is an integer number (15407196273).

Almost surely, 2^210500650009 is an apocalyptic number.

It is an amenable number.

210500650009 is a deficient number, since it is larger than the sum of its proper divisors (36014490359).

210500650009 is a wasteful number, since it uses less digits than its factorization.

210500650009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25743084.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 210500650009 in words is "two hundred ten billion, five hundred million, six hundred fifty thousand, nine".