194655964913 has 2 divisors, whose sum is σ = 194655964914. Its totient is φ = 194655964912.

The previous prime is 194655964873. The next prime is 194655964933. The reversal of 194655964913 is 319469556491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128990877409 + 65665087504 = 359153^2 + 256252^2 .

It is a cyclic number.

It is not a de Polignac number, because 194655964913 - 2⁶ = 194655964849 is a prime.

It is a super-2 number, since 2×194655964913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194655964933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97327982456 + 97327982457.

It is an arithmetic number, because the mean of its divisors is an integer number (97327982457).

Almost surely, 2^194655964913 is an apocalyptic number.

It is an amenable number.

194655964913 is a deficient number, since it is larger than the sum of its proper divisors (1).

194655964913 is an equidigital number, since it uses as much as digits as its factorization.

194655964913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31492800, while the sum is 62.

The spelling of 194655964913 in words is "one hundred ninety-four billion, six hundred fifty-five million, nine hundred sixty-four thousand, nine hundred thirteen".