200557978569 has 27 divisors (see below), whose sum is σ = 313720568967. Its totient is φ = 123409546416.

The previous prime is 200557978561. The next prime is 200557978583. The reversal of 200557978569 is 965879755002.

The square root of 200557978569 is 447837.

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

200557978569 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 579 + 7 + 8 + 56 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29668340025 + 170889638544 = 172245^2 + 413388^2 .

It is not a de Polignac number, because 200557978569 - 2³ = 200557978561 is a prime.

It is a super-2 number, since 2×200557978569² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200557978561) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17459902 + ... + 17471384.

Almost surely, 2^200557978569 is an apocalyptic number.

200557978569 is the 447837-th square number.

200557978569 is the 223919-th centered octagonal number.

It is an amenable number.

200557978569 is a deficient number, since it is larger than the sum of its proper divisors (113162590398).

200557978569 is an frugal number, since it uses more digits than its factorization.

200557978569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22998 (or 11499 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 63.

The spelling of 200557978569 in words is "two hundred billion, five hundred fifty-seven million, nine hundred seventy-eight thousand, five hundred sixty-nine".