194534518505 has 8 divisors (see below), whose sum is σ = 241491126600. Its totient is φ = 150261145216.

The previous prime is 194534518501. The next prime is 194534518513. The reversal of 194534518505 is 505815435491.

It can be written as a sum of positive squares in 4 ways, for example, as 4658199001 + 189876319504 = 68251^2 + 435748^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 194534518505 - 2² = 194534518501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194534518501) 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, 670808540 + ... + 670808829.

It is an arithmetic number, because the mean of its divisors is an integer number (30186390825).

Almost surely, 2^194534518505 is an apocalyptic number.

It is an amenable number.

194534518505 is a deficient number, since it is larger than the sum of its proper divisors (46956608095).

194534518505 is a wasteful number, since it uses less digits than its factorization.

194534518505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341617403.

The product of its (nonzero) digits is 2160000, while the sum is 50.

The spelling of 194534518505 in words is "one hundred ninety-four billion, five hundred thirty-four million, five hundred eighteen thousand, five hundred five".