194898078385920 has 1728 divisors, whose sum is σ = 875765639024640. Its totient is φ = 38891090608128.

The previous prime is 194898078385903. The next prime is 194898078385949. The reversal of 194898078385920 is 29583870898491.

194898078385920 is a `hidden beast` number, since 1 + 9 + 4 + 8 + 9 + 80 + 78 + 385 + 92 + 0 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 194898078385920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2145865629 + ... + 2145956451.

It is an arithmetic number, because the mean of its divisors is an integer number (506808818880).

Almost surely, 2^{194898078385920} is an apocalyptic number.

194898078385920 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 194898078385920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437882819512320).

194898078385920 is an abundant number, since it is smaller than the sum of its proper divisors (680867560638720).

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

194898078385920 is a wasteful number, since it uses less digits than its factorization.

194898078385920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90982 (or 90965 counting only the distinct ones).

The product of its (nonzero) digits is 2508226560, while the sum is 81.

The spelling of 194898078385920 in words is "one hundred ninety-four trillion, eight hundred ninety-eight billion, seventy-eight million, three hundred eighty-five thousand, nine hundred twenty".