194507775829 has 2 divisors, whose sum is σ = 194507775830. Its totient is φ = 194507775828.

The previous prime is 194507775827. The next prime is 194507775947. The reversal of 194507775829 is 928577705491.

194507775829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180293652100 + 14214123729 = 424610^2 + 119223^2 .

It is a cyclic number.

It is not a de Polignac number, because 194507775829 - 2¹ = 194507775827 is a prime.

Together with 194507775827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194507775823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97253887914 + 97253887915.

It is an arithmetic number, because the mean of its divisors is an integer number (97253887915).

Almost surely, 2^194507775829 is an apocalyptic number.

It is an amenable number.

194507775829 is a deficient number, since it is larger than the sum of its proper divisors (1).

194507775829 is an equidigital number, since it uses as much as digits as its factorization.

194507775829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44452800, while the sum is 64.

The spelling of 194507775829 in words is "one hundred ninety-four billion, five hundred seven million, seven hundred seventy-five thousand, eight hundred twenty-nine".