209715867053 has 16 divisors (see below), whose sum is σ = 261713289600. Its totient is φ = 163259116800.

The previous prime is 209715867029. The next prime is 209715867083. The reversal of 209715867053 is 350768517902.

It is a cyclic number.

It is not a de Polignac number, because 209715867053 - 2¹⁶ = 209715801517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209715866986 and 209715867004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209715867083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1217408 + ... + 1378953.

It is an arithmetic number, because the mean of its divisors is an integer number (16357080600).

Almost surely, 2^209715867053 is an apocalyptic number.

It is an amenable number.

209715867053 is a deficient number, since it is larger than the sum of its proper divisors (51997422547).

209715867053 is a wasteful number, since it uses less digits than its factorization.

209715867053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597428.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 209715867053 in words is "two hundred nine billion, seven hundred fifteen million, eight hundred sixty-seven thousand, fifty-three".