196644415811 has 2 divisors, whose sum is σ = 196644415812. Its totient is φ = 196644415810.

The previous prime is 196644415787. The next prime is 196644415837. The reversal of 196644415811 is 118514446691.

It is a weak prime.

It is an emirp because it is prime and its reverse (118514446691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196644415811 - 2¹⁰ = 196644414787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196644415811.

It is not a weakly prime, because it can be changed into another prime (196644415861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98322207905 + 98322207906.

It is an arithmetic number, because the mean of its divisors is an integer number (98322207906).

Almost surely, 2^196644415811 is an apocalyptic number.

196644415811 is a deficient number, since it is larger than the sum of its proper divisors (1).

196644415811 is an equidigital number, since it uses as much as digits as its factorization.

196644415811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 50.

The spelling of 196644415811 in words is "one hundred ninety-six billion, six hundred forty-four million, four hundred fifteen thousand, eight hundred eleven".