194644381355 has 4 divisors (see below), whose sum is σ = 233573257632. Its totient is φ = 155715505080.

The previous prime is 194644381307. The next prime is 194644381387. The reversal of 194644381355 is 553183446491.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 194644381355 - 2¹⁰ = 194644380331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194644381297 and 194644381306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19464438131 + ... + 19464438140.

It is an arithmetic number, because the mean of its divisors is an integer number (58393314408).

Almost surely, 2^194644381355 is an apocalyptic number.

194644381355 is a deficient number, since it is larger than the sum of its proper divisors (38928876277).

194644381355 is an equidigital number, since it uses as much as digits as its factorization.

194644381355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38928876276.

The product of its digits is 6220800, while the sum is 53.

The spelling of 194644381355 in words is "one hundred ninety-four billion, six hundred forty-four million, three hundred eighty-one thousand, three hundred fifty-five".