194208803664 has 20 divisors (see below), whose sum is σ = 501706076256. Its totient is φ = 64736267872.

The previous prime is 194208803651. The next prime is 194208803717. The reversal of 194208803664 is 466308802491.

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, 2023008324 + ... + 2023008419.

Almost surely, 2^194208803664 is an apocalyptic number.

It is an amenable number.

194208803664 is an abundant number, since it is smaller than the sum of its proper divisors (307497272592).

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

194208803664 is a wasteful number, since it uses less digits than its factorization.

194208803664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046016754 (or 4046016748 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 194208803664 in words is "one hundred ninety-four billion, two hundred eight million, eight hundred three thousand, six hundred sixty-four".