194775658493 has 64 divisors (see below), whose sum is σ = 239181465600. Its totient is φ = 156753273600.

The previous prime is 194775658489. The next prime is 194775658507. The reversal of 194775658493 is 394856577491.

It is a cyclic number.

It is not a de Polignac number, because 194775658493 - 2² = 194775658489 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 (194775658433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50576018 + ... + 50579868.

It is an arithmetic number, because the mean of its divisors is an integer number (3737210400).

Almost surely, 2^194775658493 is an apocalyptic number.

194775658493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

194775658493 is a deficient number, since it is larger than the sum of its proper divisors (44405807107).

194775658493 is a wasteful number, since it uses less digits than its factorization.

194775658493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242.

The product of its digits is 228614400, while the sum is 68.

The spelling of 194775658493 in words is "one hundred ninety-four billion, seven hundred seventy-five million, six hundred fifty-eight thousand, four hundred ninety-three".