194955821760 has 672 divisors, whose sum is σ = 741566403072. Its totient is φ = 43370127360.

The previous prime is 194955821659. The next prime is 194955821773. The reversal of 194955821760 is 67128559491.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

It is a self number, because there is not a number n which added to its sum of digits gives 194955821760.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 693792820 + ... + 693793100.

Almost surely, 2^194955821760 is an apocalyptic number.

194955821760 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 194955821760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370783201536).

194955821760 is an abundant number, since it is smaller than the sum of its proper divisors (546610581312).

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

194955821760 is an frugal number, since it uses more digits than its factorization.

194955821760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 194955821760 in words is "one hundred ninety-four billion, nine hundred fifty-five million, eight hundred twenty-one thousand, seven hundred sixty".