194893433856 has 396 divisors, whose sum is σ = 641569282536. Its totient is φ = 59049492480.

The previous prime is 194893433773. The next prime is 194893433879. The reversal of 194893433856 is 658334398491.

194893433856 is a `hidden beast` number, since 19 + 489 + 34 + 33 + 85 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (396).

It is a junction number, because it is equal to n+sod(n) for n = 194893433793 and 194893433802.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30105436 + ... + 30111908.

Almost surely, 2^194893433856 is an apocalyptic number.

194893433856 is a gapful number since it is divisible by the number (16) 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 194893433856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320784641268).

194893433856 is an abundant number, since it is smaller than the sum of its proper divisors (446675848680).

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

194893433856 is an equidigital number, since it uses as much as digits as its factorization.

194893433856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6489 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 194893433856 in words is "one hundred ninety-four billion, eight hundred ninety-three million, four hundred thirty-three thousand, eight hundred fifty-six".