204194630641 has 3 divisors (see below), whose sum is σ = 204195082521. Its totient is φ = 204194178762.

The previous prime is 204194630617. The next prime is 204194630737. The reversal of 204194630641 is 146036491402.

The square root of 204194630641 is 451879.

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.

It is not a de Polignac number, because 204194630641 - 2²³ = 204186242033 is a prime.

It is a super-2 number, since 2×204194630641² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204194630594 and 204194630603.

It is not an unprimeable number, because it can be changed into a prime (204194630441) 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 2 ways as a sum of consecutive naturals, for example, 225940 + ... + 677818.

It is an arithmetic number, because the mean of its divisors is an integer number (68065027507).

Almost surely, 2^204194630641 is an apocalyptic number.

204194630641 is the 451879-th square number.

204194630641 is the 225940-th centered octagonal number.

It is an amenable number.

204194630641 is a deficient number, since it is larger than the sum of its proper divisors (451880).

204194630641 is an frugal number, since it uses more digits than its factorization.

204194630641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903758 (or 451879 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 204194630641 in words is "two hundred four billion, one hundred ninety-four million, six hundred thirty thousand, six hundred forty-one".