196792664821 has 2 divisors, whose sum is σ = 196792664822. Its totient is φ = 196792664820.

The previous prime is 196792664807. The next prime is 196792664879. The reversal of 196792664821 is 128466297691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191030184900 + 5762479921 = 437070^2 + 75911^2 .

It is a cyclic number.

It is not a de Polignac number, because 196792664821 - 2⁷ = 196792664693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196792664821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196792664881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98396332410 + 98396332411.

It is an arithmetic number, because the mean of its divisors is an integer number (98396332411).

Almost surely, 2^196792664821 is an apocalyptic number.

It is an amenable number.

196792664821 is a deficient number, since it is larger than the sum of its proper divisors (1).

196792664821 is an equidigital number, since it uses as much as digits as its factorization.

196792664821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 61.

The spelling of 196792664821 in words is "one hundred ninety-six billion, seven hundred ninety-two million, six hundred sixty-four thousand, eight hundred twenty-one".