194564827837 has 2 divisors, whose sum is σ = 194564827838. Its totient is φ = 194564827836.

The previous prime is 194564827823. The next prime is 194564827871. The reversal of 194564827837 is 738728465491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151181770041 + 43383057796 = 388821^2 + 208286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194564827837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194564821837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97282413918 + 97282413919.

It is an arithmetic number, because the mean of its divisors is an integer number (97282413919).

Almost surely, 2^194564827837 is an apocalyptic number.

It is an amenable number.

194564827837 is a deficient number, since it is larger than the sum of its proper divisors (1).

194564827837 is an equidigital number, since it uses as much as digits as its factorization.

194564827837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 64.

The spelling of 194564827837 in words is "one hundred ninety-four billion, five hundred sixty-four million, eight hundred twenty-seven thousand, eight hundred thirty-seven".