394857357145 has 4 divisors (see below), whose sum is σ = 473828828580. Its totient is φ = 315885885712.

The previous prime is 394857357113. The next prime is 394857357221. The reversal of 394857357145 is 541753758493.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113393154121 + 281464203024 = 336739^2 + 530532^2 .

It is a cyclic number.

It is not a de Polignac number, because 394857357145 - 2⁵ = 394857357113 is a prime.

It is a super-3 number, since 3×394857357145³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39485735710 + ... + 39485735719.

It is an arithmetic number, because the mean of its divisors is an integer number (118457207145).

Almost surely, 2^394857357145 is an apocalyptic number.

It is an amenable number.

394857357145 is a deficient number, since it is larger than the sum of its proper divisors (78971471435).

394857357145 is an equidigital number, since it uses as much as digits as its factorization.

394857357145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78971471434.

The product of its digits is 63504000, while the sum is 61.

The spelling of 394857357145 in words is "three hundred ninety-four billion, eight hundred fifty-seven million, three hundred fifty-seven thousand, one hundred forty-five".