394043041664 has 32 divisors (see below), whose sum is σ = 826323817800. Its totient is φ = 186651965952.

The previous prime is 394043041631. The next prime is 394043041709. The reversal of 394043041664 is 466140340493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 81009707 + ... + 81014570.

Almost surely, 2^394043041664 is an apocalyptic number.

It is an amenable number.

394043041664 is an abundant number, since it is smaller than the sum of its proper divisors (432280776136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394043041664 is a wasteful number, since it uses less digits than its factorization.

394043041664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162024310 (or 162024298 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 394043041664 in words is "three hundred ninety-four billion, forty-three million, forty-one thousand, six hundred sixty-four".