394645546493 has 4 divisors (see below), whose sum is σ = 430522414368. Its totient is φ = 358768678620.

The previous prime is 394645546441. The next prime is 394645546507.

394645546493 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-394645546493 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 (394645546403) 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, 17938433921 + ... + 17938433942.

It is an arithmetic number, because the mean of its divisors is an integer number (107630603592).

Almost surely, 2^394645546493 is an apocalyptic number.

It is an amenable number.

394645546493 is a deficient number, since it is larger than the sum of its proper divisors (35876867875).

394645546493 is a wasteful number, since it uses less digits than its factorization.

394645546493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35876867874.

The product of its digits is 167961600, while the sum is 62.

The spelling of 394645546493 in words is "three hundred ninety-four billion, six hundred forty-five million, five hundred forty-six thousand, four hundred ninety-three".