194354533921 has 8 divisors (see below), whose sum is σ = 204285060864. Its totient is φ = 184547367840.

The previous prime is 194354533873. The next prime is 194354533973. The reversal of 194354533921 is 129335453491.

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 194354533921 - 2¹¹ = 194354531873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194354539921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30836985 + ... + 30843286.

It is an arithmetic number, because the mean of its divisors is an integer number (25535632608).

Almost surely, 2^194354533921 is an apocalyptic number.

It is an amenable number.

194354533921 is a deficient number, since it is larger than the sum of its proper divisors (9930526943).

194354533921 is a wasteful number, since it uses less digits than its factorization.

194354533921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61680431.

The product of its digits is 1749600, while the sum is 49.

The spelling of 194354533921 in words is "one hundred ninety-four billion, three hundred fifty-four million, five hundred thirty-three thousand, nine hundred twenty-one".