194558540545 has 8 divisors (see below), whose sum is σ = 233562873960. Its totient is φ = 155585082240.

The previous prime is 194558540489. The next prime is 194558540549. The reversal of 194558540545 is 545045855491.

It is a happy number.

194558540545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10875152656 + 183683387889 = 104284^2 + 428583^2 .

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

It is not a de Polignac number, because 194558540545 - 2¹³ = 194558532353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194558540549) 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, 7704910 + ... + 7730119.

It is an arithmetic number, because the mean of its divisors is an integer number (29195359245).

Almost surely, 2^194558540545 is an apocalyptic number.

It is an amenable number.

194558540545 is a deficient number, since it is larger than the sum of its proper divisors (39004333415).

194558540545 is a wasteful number, since it uses less digits than its factorization.

194558540545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15437555.

The product of its (nonzero) digits is 14400000, while the sum is 55.

The spelling of 194558540545 in words is "one hundred ninety-four billion, five hundred fifty-eight million, five hundred forty thousand, five hundred forty-five".