194744459869 has 8 divisors (see below), whose sum is σ = 199896770520. Its totient is φ = 189655368000.

The previous prime is 194744459851. The next prime is 194744459873. The reversal of 194744459869 is 968954447491.

It can be written as a sum of positive squares in 4 ways, for example, as 7914771225 + 186829688644 = 88965^2 + 432238^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194744459869 is a prime.

It is a super-2 number, since 2×194744459869² (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 = 194744459798 and 194744459807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194744459839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15798454 + ... + 15810775.

It is an arithmetic number, because the mean of its divisors is an integer number (24987096315).

Almost surely, 2^194744459869 is an apocalyptic number.

It is an amenable number.

194744459869 is a deficient number, since it is larger than the sum of its proper divisors (5152310651).

194744459869 is a wasteful number, since it uses less digits than its factorization.

194744459869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31609391.

The product of its digits is 313528320, while the sum is 70.

The spelling of 194744459869 in words is "one hundred ninety-four billion, seven hundred forty-four million, four hundred fifty-nine thousand, eight hundred sixty-nine".