194506578841 has 3 divisors (see below), whose sum is σ = 194507019871. Its totient is φ = 194506137812.

The previous prime is 194506578793. The next prime is 194506578857. The reversal of 194506578841 is 148875605491.

The square root of 194506578841 is 441029.

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 can be written as a sum of positive squares in only one way, i.e., 112378482441 + 82128096400 = 335229^2 + 286580^2 .

It is not a de Polignac number, because 194506578841 - 2¹³ = 194506570649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194506578341) 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, 220515 + ... + 661543.

Almost surely, 2^194506578841 is an apocalyptic number.

194506578841 is the 441029-th square number.

194506578841 is the 220515-th centered octagonal number.

It is an amenable number.

194506578841 is a deficient number, since it is larger than the sum of its proper divisors (441030).

194506578841 is an frugal number, since it uses more digits than its factorization.

194506578841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882058 (or 441029 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 194506578841 in words is "one hundred ninety-four billion, five hundred six million, five hundred seventy-eight thousand, eight hundred forty-one".