394069066911 has 24 divisors (see below), whose sum is σ = 613331447456. Its totient is φ = 242371465920.

The previous prime is 394069066907. The next prime is 394069066921. The reversal of 394069066911 is 119660960493.

394069066911 is a `hidden beast` number, since 3 + 9 + 406 + 90 + 66 + 91 + 1 = 666.

It is not a de Polignac number, because 394069066911 - 2² = 394069066907 is a prime.

It is a super-2 number, since 2×394069066911² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394069066921) 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 in 23 ways as a sum of consecutive naturals, for example, 705520 + ... + 1133973.

Almost surely, 2^394069066911 is an apocalyptic number.

394069066911 is a deficient number, since it is larger than the sum of its proper divisors (219262380545).

394069066911 is a wasteful number, since it uses less digits than its factorization.

394069066911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841343 (or 1841340 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 394069066911 in words is "three hundred ninety-four billion, sixty-nine million, sixty-six thousand, nine hundred eleven".