195658482889 has 3 divisors (see below), whose sum is σ = 195658925223. Its totient is φ = 195658040556.

The previous prime is 195658482883. The next prime is 195658482919. The reversal of 195658482889 is 988284856591.

The square root of 195658482889 is 442333.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988284856591 = 557 ⋅1774299563.

It can be written as a sum of positive squares in only one way, i.e., 95607732025 + 100050750864 = 309205^2 + 316308^2 .

It is not a de Polignac number, because 195658482889 - 2⁹ = 195658482377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195658482883) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 221167 + ... + 663499.

It is an arithmetic number, because the mean of its divisors is an integer number (65219641741).

Almost surely, 2^195658482889 is an apocalyptic number.

195658482889 is the 442333-rd square number.

195658482889 is the 221167-th centered octagonal number.

It is an amenable number.

195658482889 is a deficient number, since it is larger than the sum of its proper divisors (442334).

195658482889 is an frugal number, since it uses more digits than its factorization.

195658482889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884666 (or 442333 counting only the distinct ones).

The product of its digits is 398131200, while the sum is 73.

The spelling of 195658482889 in words is "one hundred ninety-five billion, six hundred fifty-eight million, four hundred eighty-two thousand, eight hundred eighty-nine".