194428538529 has 8 divisors (see below), whose sum is σ = 259306233312. Its totient is φ = 129584934720.

The previous prime is 194428538519. The next prime is 194428538567. The reversal of 194428538529 is 925835824491.

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

It is not a de Polignac number, because 194428538529 - 2⁷ = 194428538401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194428538519) 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, 8509432 + ... + 8532249.

It is an arithmetic number, because the mean of its divisors is an integer number (32413279164).

Almost surely, 2^194428538529 is an apocalyptic number.

It is an amenable number.

194428538529 is a deficient number, since it is larger than the sum of its proper divisors (64877694783).

194428538529 is a wasteful number, since it uses less digits than its factorization.

194428538529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17045487.

The product of its digits is 24883200, while the sum is 60.

The spelling of 194428538529 in words is "one hundred ninety-four billion, four hundred twenty-eight million, five hundred thirty-eight thousand, five hundred twenty-nine".