194420857606144 has 117 divisors (see below), whose sum is σ = 421027179259473. Its totient is φ = 89727349211136.

The previous prime is 194420857606051. The next prime is 194420857606189. The reversal of 194420857606144 is 441606758024491.

The square root of 194420857606144 is 13943488.

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., 28760481894400 + 165660375711744 = 5362880^2 + 12870912^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11600973637 + ... + 11600990395.

Almost surely, 2^{194420857606144} is an apocalyptic number.

194420857606144 is the 13943488-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194420857606144

194420857606144 is an abundant number, since it is smaller than the sum of its proper divisors (226606321653329).

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

194420857606144 is an frugal number, since it uses more digits than its factorization.

194420857606144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33568 (or 16774 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 194420857606144 in words is "one hundred ninety-four trillion, four hundred twenty billion, eight hundred fifty-seven million, six hundred six thousand, one hundred forty-four".