394564985071 has 4 divisors (see below), whose sum is σ = 398998299600. Its totient is φ = 390131670544.

The previous prime is 394564985069. The next prime is 394564985077. The reversal of 394564985071 is 170589465493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170589465493 = 2897 ⋅58884869.

It is a cyclic number.

It is not a de Polignac number, because 394564985071 - 2¹ = 394564985069 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 (394564985077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2216657131 + ... + 2216657308.

It is an arithmetic number, because the mean of its divisors is an integer number (99749574900).

Almost surely, 2^394564985071 is an apocalyptic number.

394564985071 is a deficient number, since it is larger than the sum of its proper divisors (4433314529).

394564985071 is an equidigital number, since it uses as much as digits as its factorization.

394564985071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433314528.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 394564985071 in words is "three hundred ninety-four billion, five hundred sixty-four million, nine hundred eighty-five thousand, seventy-one".