194143180440 has 256 divisors, whose sum is σ = 656689213440. Its totient is φ = 45537561600.

The previous prime is 194143180421. The next prime is 194143180447. The reversal of 194143180440 is 44081341491.

It is a super-2 number, since 2×194143180440² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194143180447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39321652 + ... + 39326588.

It is an arithmetic number, because the mean of its divisors is an integer number (2565192240).

Almost surely, 2^194143180440 is an apocalyptic number.

194143180440 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 194143180440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328344606720).

194143180440 is an abundant number, since it is smaller than the sum of its proper divisors (462546033000).

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

194143180440 is a wasteful number, since it uses less digits than its factorization.

194143180440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055 (or 4989 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 194143180440 in words is "one hundred ninety-four billion, one hundred forty-three million, one hundred eighty thousand, four hundred forty".