194968166399 has 8 divisors (see below), whose sum is σ = 197327612160. Its totient is φ = 192608969176.

The previous prime is 194968166369. The next prime is 194968166401. The reversal of 194968166399 is 993661869491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194968166399 - 2²⁸ = 194699730943 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 (194968166369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881704 + ... + 1982610.

It is an arithmetic number, because the mean of its divisors is an integer number (24665951520).

Almost surely, 2^194968166399 is an apocalyptic number.

194968166399 is a deficient number, since it is larger than the sum of its proper divisors (2359445761).

194968166399 is a wasteful number, since it uses less digits than its factorization.

194968166399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124269.

The product of its digits is 136048896, while the sum is 71.

The spelling of 194968166399 in words is "one hundred ninety-four billion, nine hundred sixty-eight million, one hundred sixty-six thousand, three hundred ninety-nine".