394564361091 has 16 divisors (see below), whose sum is σ = 526936768128. Its totient is φ = 262617768000.

The previous prime is 394564361071. The next prime is 394564361119. The reversal of 394564361091 is 190163465493.

It is not a de Polignac number, because 394564361091 - 2⁹ = 394564360579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394564361011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4786375 + ... + 4868111.

It is an arithmetic number, because the mean of its divisors is an integer number (32933548008).

Almost surely, 2^394564361091 is an apocalyptic number.

394564361091 is a deficient number, since it is larger than the sum of its proper divisors (132372407037).

394564361091 is a wasteful number, since it uses less digits than its factorization.

394564361091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84322.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 394564361091 in words is "three hundred ninety-four billion, five hundred sixty-four million, three hundred sixty-one thousand, ninety-one".