219685251299089 has 9 divisors (see below), whose sum is σ = 220017508333819. Its totient is φ = 219353495330200.

The previous prime is 219685251299083. The next prime is 219685251299123. The reversal of 219685251299089 is 980992152586912.

The square root of 219685251299089 is 14821783.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 193164605266689 + 26520646032400 = 13898367^2 + 5149820^2 .

It is not a de Polignac number, because 219685251299089 - 2⁴¹ = 217486228043537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219685251299083) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10123266939 + ... + 10123288639.

Almost surely, 2^{219685251299089} is an apocalyptic number.

219685251299089 is the 14821783-rd square number.

219685251299089 is the 7410892-nd centered octagonal number.

It is an amenable number.

219685251299089 is a deficient number, since it is larger than the sum of its proper divisors (332257034730).

219685251299089 is an frugal number, since it uses more digits than its factorization.

219685251299089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44768 (or 22384 counting only the distinct ones).

The product of its (nonzero) digits is 503884800, while the sum is 76.

The spelling of 219685251299089 in words is "two hundred nineteen trillion, six hundred eighty-five billion, two hundred fifty-one million, two hundred ninety-nine thousand, eighty-nine".