194775545137 has 2 divisors, whose sum is σ = 194775545138. Its totient is φ = 194775545136.

The previous prime is 194775545099. The next prime is 194775545141. The reversal of 194775545137 is 731545577491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127385461921 + 67390083216 = 356911^2 + 259596^2 .

It is a cyclic number.

It is not a de Polignac number, because 194775545137 - 2¹¹ = 194775543089 is a prime.

It is not a weakly prime, because it can be changed into another prime (194775945137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97387772568 + 97387772569.

It is an arithmetic number, because the mean of its divisors is an integer number (97387772569).

Almost surely, 2^194775545137 is an apocalyptic number.

It is an amenable number.

194775545137 is a deficient number, since it is larger than the sum of its proper divisors (1).

194775545137 is an equidigital number, since it uses as much as digits as its factorization.

194775545137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18522000, while the sum is 58.

The spelling of 194775545137 in words is "one hundred ninety-four billion, seven hundred seventy-five million, five hundred forty-five thousand, one hundred thirty-seven".