394534534671 has 16 divisors (see below), whose sum is σ = 615258534400. Its totient is φ = 249179705784.

The previous prime is 394534534643. The next prime is 394534534687. The reversal of 394534534671 is 176435435493.

394534534671 is a `hidden beast` number, since 3 + 9 + 4 + 5 + 34 + 534 + 6 + 71 = 666.

It is not a de Polignac number, because 394534534671 - 2¹⁹ = 394534010383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394534532671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384536071 + ... + 384537096.

It is an arithmetic number, because the mean of its divisors is an integer number (38453658400).

Almost surely, 2^394534534671 is an apocalyptic number.

394534534671 is a deficient number, since it is larger than the sum of its proper divisors (220723999729).

394534534671 is a wasteful number, since it uses less digits than its factorization.

394534534671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769073195 (or 769073189 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 54.

The spelling of 394534534671 in words is "three hundred ninety-four billion, five hundred thirty-four million, five hundred thirty-four thousand, six hundred seventy-one".