194412918780640 has 960 divisors, whose sum is σ = 584629429265280. Its totient is φ = 60850016747520.

The previous prime is 194412918780601. The next prime is 194412918780649. The reversal of 194412918780640 is 46087819214491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194412918780649) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 30805403085 + ... + 30805409395.

It is an arithmetic number, because the mean of its divisors is an integer number (608988988818).

Almost surely, 2^{194412918780640} is an apocalyptic number.

194412918780640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194412918780640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292314714632640).

194412918780640 is an abundant number, since it is smaller than the sum of its proper divisors (390216510484640).

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

194412918780640 is an equidigital number, since it uses as much as digits as its factorization.

194412918780640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513 (or 6484 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 194412918780640 in words is "one hundred ninety-four trillion, four hundred twelve billion, nine hundred eighteen million, seven hundred eighty thousand, six hundred forty".