194828417647 has 4 divisors (see below), whose sum is σ = 194830857376. Its totient is φ = 194825977920.

The previous prime is 194828417629. The next prime is 194828417713. The reversal of 194828417647 is 746714828491.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194828417647 is a prime.

It is a super-2 number, since 2×194828417647² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194828417947) 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, 1095879 + ... + 1261192.

It is an arithmetic number, because the mean of its divisors is an integer number (48707714344).

Almost surely, 2^194828417647 is an apocalyptic number.

194828417647 is a deficient number, since it is larger than the sum of its proper divisors (2439729).

194828417647 is an equidigital number, since it uses as much as digits as its factorization.

194828417647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439728.

The product of its digits is 21676032, while the sum is 61.

The spelling of 194828417647 in words is "one hundred ninety-four billion, eight hundred twenty-eight million, four hundred seventeen thousand, six hundred forty-seven".