196604792721 has 12 divisors (see below), whose sum is σ = 284236251780. Its totient is φ = 130953761280.

The previous prime is 196604792717. The next prime is 196604792771. The reversal of 196604792721 is 127297406691.

196604792721 is a `hidden beast` number, since 1 + 9 + 6 + 604 + 7 + 9 + 2 + 7 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37193051025 + 159411741696 = 192855^2 + 399264^2 .

It is not a de Polignac number, because 196604792721 - 2² = 196604792717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196604792771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9664320 + ... + 9684641.

It is an arithmetic number, because the mean of its divisors is an integer number (23686354315).

Almost surely, 2^196604792721 is an apocalyptic number.

It is an amenable number.

196604792721 is a deficient number, since it is larger than the sum of its proper divisors (87631459059).

196604792721 is a wasteful number, since it uses less digits than its factorization.

196604792721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19350096 (or 19350093 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 196604792721 in words is "one hundred ninety-six billion, six hundred four million, seven hundred ninety-two thousand, seven hundred twenty-one".