394616826499 has 4 divisors (see below), whose sum is σ = 450990658864. Its totient is φ = 338242994136.

The previous prime is 394616826493. The next prime is 394616826601. The reversal of 394616826499 is 994628616493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 394616826499 - 2¹⁹ = 394616302211 is a prime.

It is a super-2 number, since 2×394616826499² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394616826493) 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 3 ways as a sum of consecutive naturals, for example, 28186916172 + ... + 28186916185.

It is an arithmetic number, because the mean of its divisors is an integer number (112747664716).

Almost surely, 2^394616826499 is an apocalyptic number.

394616826499 is a deficient number, since it is larger than the sum of its proper divisors (56373832365).

394616826499 is an equidigital number, since it uses as much as digits as its factorization.

394616826499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56373832364.

The product of its digits is 120932352, while the sum is 67.

The spelling of 394616826499 in words is "three hundred ninety-four billion, six hundred sixteen million, eight hundred twenty-six thousand, four hundred ninety-nine".