194147326221 has 16 divisors (see below), whose sum is σ = 265889452224. Its totient is φ = 125919166464.

The previous prime is 194147326211. The next prime is 194147326259. The reversal of 194147326221 is 122623741491.

It is not a de Polignac number, because 194147326221 - 2⁶ = 194147326157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194147326211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936205 + ... + 1124621.

It is an arithmetic number, because the mean of its divisors is an integer number (16618090764).

Almost surely, 2^194147326221 is an apocalyptic number.

It is an amenable number.

194147326221 is a deficient number, since it is larger than the sum of its proper divisors (71742126003).

194147326221 is a wasteful number, since it uses less digits than its factorization.

194147326221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197740.

The product of its digits is 145152, while the sum is 42.

The spelling of 194147326221 in words is "one hundred ninety-four billion, one hundred forty-seven million, three hundred twenty-six thousand, two hundred twenty-one".