196924811621 has 2 divisors, whose sum is σ = 196924811622. Its totient is φ = 196924811620.

The previous prime is 196924811597. The next prime is 196924811651. The reversal of 196924811621 is 126118429691.

It is a happy number.

196924811621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159851234596 + 37073577025 = 399814^2 + 192545^2 .

It is a cyclic number.

It is not a de Polignac number, because 196924811621 - 2¹⁰ = 196924810597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 196924811621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196924811651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98462405810 + 98462405811.

It is an arithmetic number, because the mean of its divisors is an integer number (98462405811).

Almost surely, 2^196924811621 is an apocalyptic number.

It is an amenable number.

196924811621 is a deficient number, since it is larger than the sum of its proper divisors (1).

196924811621 is an equidigital number, since it uses as much as digits as its factorization.

196924811621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 50.

The spelling of 196924811621 in words is "one hundred ninety-six billion, nine hundred twenty-four million, eight hundred eleven thousand, six hundred twenty-one".