194649666946491 has 4 divisors (see below), whose sum is σ = 259532889261992. Its totient is φ = 129766444630992.

The previous prime is 194649666946393. The next prime is 194649666946549.

194649666946491 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 194649666946491 - 2⁷ = 194649666946363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194649626946491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32441611157746 + ... + 32441611157751.

It is an arithmetic number, because the mean of its divisors is an integer number (64883222315498).

Almost surely, 2^{194649666946491} is an apocalyptic number.

194649666946491 is a deficient number, since it is larger than the sum of its proper divisors (64883222315501).

194649666946491 is an equidigital number, since it uses as much as digits as its factorization.

194649666946491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64883222315500.

The product of its digits is 13060694016, while the sum is 84.

The spelling of 194649666946491 in words is "one hundred ninety-four trillion, six hundred forty-nine billion, six hundred sixty-six million, nine hundred forty-six thousand, four hundred ninety-one".