204563880471889 has 9 divisors (see below), whose sum is σ = 206495104664667. Its totient is φ = 202650552431064.

The previous prime is 204563880471877. The next prime is 204563880471913. The reversal of 204563880471889 is 988174088365402.

The square root of 204563880471889 is 14302583.

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., 149949396289 + 204413931075600 = 387233^2 + 14297340^2 .

It is not a de Polignac number, because 204563880471889 - 2⁴³ = 195767787449681 is a prime.

It is a super-2 number, since 2×204563880471889² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204563880471689) 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, 1530309547 + ... + 1530443215.

It is a 1-persistent number, because it is pandigital, but 2⋅204563880471889 = 409127760943778 is not.

Almost surely, 2^{204563880471889} is an apocalyptic number.

204563880471889 is the 14302583-rd square number.

204563880471889 is the 7151292-nd centered octagonal number.

It is an amenable number.

204563880471889 is a deficient number, since it is larger than the sum of its proper divisors (1931224192778).

204563880471889 is an frugal number, since it uses more digits than its factorization.

204563880471889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267552 (or 133776 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 73.

The spelling of 204563880471889 in words is "two hundred four trillion, five hundred sixty-three billion, eight hundred eighty million, four hundred seventy-one thousand, eight hundred eighty-nine".