197005485609 has 63 divisors (see below), whose sum is σ = 314094862407. Its totient is φ = 123483455424.

The previous prime is 197005485581. The next prime is 197005485629. The reversal of 197005485609 is 906584500791.

The square root of 197005485609 is 443853.

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

197005485609 is a `hidden beast` number, since 1 + 9 + 70 + 0 + 5 + 4 + 8 + 560 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 153377973225 + 43627512384 = 391635^2 + 208872^2 .

It is not a de Polignac number, because 197005485609 - 2⁵ = 197005485577 is a prime.

It is a super-2 number, since 2×197005485609² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197005485629) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 203728044 + ... + 203729010.

Almost surely, 2^197005485609 is an apocalyptic number.

197005485609 is the 443853-rd square number.

197005485609 is the 221927-th centered octagonal number.

It is an amenable number.

197005485609 is a deficient number, since it is larger than the sum of its proper divisors (117089376798).

197005485609 is an frugal number, since it uses more digits than its factorization.

197005485609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 197005485609 in words is "one hundred ninety-seven billion, five million, four hundred eighty-five thousand, six hundred nine".