194611557904 has 45 divisors (see below), whose sum is σ = 390613017613. Its totient is φ = 93925702976.

The previous prime is 194611557901. The next prime is 194611557929. The reversal of 194611557904 is 409755116491.

The square root of 194611557904 is 441148.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 102049580304 + 92561977600 = 319452^2 + 304240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194611557901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51171267 + ... + 51175069.

Almost surely, 2^194611557904 is an apocalyptic number.

194611557904 is the 441148-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194611557904

194611557904 is an abundant number, since it is smaller than the sum of its proper divisors (196001459709).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194611557904 is an frugal number, since it uses more digits than its factorization.

194611557904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672 (or 3834 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 194611557904 in words is "one hundred ninety-four billion, six hundred eleven million, five hundred fifty-seven thousand, nine hundred four".