194242606866 has 288 divisors, whose sum is σ = 575106816960. Its totient is φ = 46677657600.

The previous prime is 194242606853. The next prime is 194242606879. The reversal of 194242606866 is 668606242491.

194242606866 is a `hidden beast` number, since 1 + 9 + 4 + 24 + 2 + 606 + 8 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (194242606853) and next prime (194242606879).

It is a super-3 number, since 3×194242606866³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9721126 + ... + 9741086.

It is an arithmetic number, because the mean of its divisors is an integer number (1996898670).

Almost surely, 2^194242606866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194242606866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287553408480).

194242606866 is an abundant number, since it is smaller than the sum of its proper divisors (380864210094).

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

194242606866 is a wasteful number, since it uses less digits than its factorization.

194242606866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20070 (or 20060 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

It can be divided in two parts, 194242 and 606866, that added together give a palindrome (801108).

The spelling of 194242606866 in words is "one hundred ninety-four billion, two hundred forty-two million, six hundred six thousand, eight hundred sixty-six".