200559769921 has 9 divisors (see below), whose sum is σ = 233307868899. Its totient is φ = 171905687184.

The previous prime is 200559769913. The next prime is 200559769933. The reversal of 200559769921 is 129967955002.

The square root of 200559769921 is 447839.

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., 110160929025 + 90398840896 = 331905^2 + 300664^2 .

It is not a de Polignac number, because 200559769921 - 2³ = 200559769913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200559769981) 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, 3102885 + ... + 3166861.

Almost surely, 2^200559769921 is an apocalyptic number.

200559769921 is the 447839-th square number.

200559769921 is the 223920-th centered octagonal number.

It is an amenable number.

200559769921 is a deficient number, since it is larger than the sum of its proper divisors (32748098978).

200559769921 is an frugal number, since it uses more digits than its factorization.

200559769921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127968 (or 63984 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 200559769921 in words is "two hundred billion, five hundred fifty-nine million, seven hundred sixty-nine thousand, nine hundred twenty-one".