194564479253 has 2 divisors, whose sum is σ = 194564479254. Its totient is φ = 194564479252.

The previous prime is 194564479199. The next prime is 194564479261. The reversal of 194564479253 is 352974465491.

194564479253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193478579044 + 1085900209 = 439862^2 + 32953^2 .

It is a cyclic number.

It is not a de Polignac number, because 194564479253 - 2¹⁸ = 194564217109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194564479192 and 194564479201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194564479553) 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, 97282239626 + 97282239627.

It is an arithmetic number, because the mean of its divisors is an integer number (97282239627).

Almost surely, 2^194564479253 is an apocalyptic number.

It is an amenable number.

194564479253 is a deficient number, since it is larger than the sum of its proper divisors (1).

194564479253 is an equidigital number, since it uses as much as digits as its factorization.

194564479253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 59.

The spelling of 194564479253 in words is "one hundred ninety-four billion, five hundred sixty-four million, four hundred seventy-nine thousand, two hundred fifty-three".