194432409261 has 8 divisors (see below), whose sum is σ = 288048013760. Its totient is φ = 129621606156.

The previous prime is 194432409247. The next prime is 194432409277. The reversal of 194432409261 is 162904234491.

194432409261 is a `hidden beast` number, since 1 + 94 + 432 + 40 + 92 + 6 + 1 = 666.

194432409261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 194432409261 - 2¹⁰ = 194432408237 is a prime.

It is a super-2 number, since 2×194432409261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194432409361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3600600145 + ... + 3600600198.

It is an arithmetic number, because the mean of its divisors is an integer number (36006001720).

Almost surely, 2^194432409261 is an apocalyptic number.

It is an amenable number.

194432409261 is a deficient number, since it is larger than the sum of its proper divisors (93615604499).

194432409261 is an equidigital number, since it uses as much as digits as its factorization.

194432409261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7201200352 (or 7201200346 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 194432409261 in words is "one hundred ninety-four billion, four hundred thirty-two million, four hundred nine thousand, two hundred sixty-one".