196577843641 has 27 divisors (see below), whose sum is σ = 211606523373. Its totient is φ = 182597912640.

The previous prime is 196577843603. The next prime is 196577843647. The reversal of 196577843641 is 146348775691.

It is a happy number.

The square root of 196577843641 is 443371.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10640954025 + 185936889616 = 103155^2 + 431204^2 .

It is not a de Polignac number, because 196577843641 - 2⁷ = 196577843513 is a prime.

It is a super-2 number, since 2×196577843641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196577843641.

It is not an unprimeable number, because it can be changed into a prime (196577843647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 377308461 + ... + 377308981.

Almost surely, 2^196577843641 is an apocalyptic number.

196577843641 is the 443371-st square number.

196577843641 is the 221686-th centered octagonal number.

It is an amenable number.

196577843641 is a deficient number, since it is larger than the sum of its proper divisors (15028679732).

196577843641 is an frugal number, since it uses more digits than its factorization.

196577843641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 581 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 61.

The spelling of 196577843641 in words is "one hundred ninety-six billion, five hundred seventy-seven million, eight hundred forty-three thousand, six hundred forty-one".