385709566213 has 2 divisors, whose sum is σ = 385709566214. Its totient is φ = 385709566212.

The previous prime is 385709566163. The next prime is 385709566217. The reversal of 385709566213 is 312665907583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254457695844 + 131251870369 = 504438^2 + 362287^2 .

It is an emirp because it is prime and its reverse (312665907583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385709566213 - 2¹⁷ = 385709435141 is a prime.

It is a super-2 number, since 2×385709566213² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385709566217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192854783106 + 192854783107.

It is an arithmetic number, because the mean of its divisors is an integer number (192854783107).

Almost surely, 2^385709566213 is an apocalyptic number.

It is an amenable number.

385709566213 is a deficient number, since it is larger than the sum of its proper divisors (1).

385709566213 is an equidigital number, since it uses as much as digits as its factorization.

385709566213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 385709566213 in words is "three hundred eighty-five billion, seven hundred nine million, five hundred sixty-six thousand, two hundred thirteen".