194799847979 has 32 divisors (see below), whose sum is σ = 227133580032. Its totient is φ = 166479350400.

The previous prime is 194799847969. The next prime is 194799847997. The reversal of 194799847979 is 979748997491.

It is a happy number.

It is not a de Polignac number, because 194799847979 - 2²⁴ = 194783070763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194799847897 and 194799847906.

It is not an unprimeable number, because it can be changed into a prime (194799847969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21423224 + ... + 21432314.

It is an arithmetic number, because the mean of its divisors is an integer number (7097924376).

Almost surely, 2^194799847979 is an apocalyptic number.

194799847979 is a deficient number, since it is larger than the sum of its proper divisors (32333732053).

194799847979 is an equidigital number, since it uses as much as digits as its factorization.

194799847979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10088 (or 10066 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 83.

The spelling of 194799847979 in words is "one hundred ninety-four billion, seven hundred ninety-nine million, eight hundred forty-seven thousand, nine hundred seventy-nine".