11809774073 has 2 divisors, whose sum is σ = 11809774074. Its totient is φ = 11809774072.

The previous prime is 11809774021. The next prime is 11809774091. The reversal of 11809774073 is 37047790811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8162580409 + 3647193664 = 90347^2 + 60392^2 .

It is a cyclic number.

It is not a de Polignac number, because 11809774073 - 2²⁰ = 11808725497 is a prime.

It is not a weakly prime, because it can be changed into another prime (11809704073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5904887036 + 5904887037.

It is an arithmetic number, because the mean of its divisors is an integer number (5904887037).

Almost surely, 2^11809774073 is an apocalyptic number.

It is an amenable number.

11809774073 is a deficient number, since it is larger than the sum of its proper divisors (1).

11809774073 is an equidigital number, since it uses as much as digits as its factorization.

11809774073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 11809774073 in words is "eleven billion, eight hundred nine million, seven hundred seventy-four thousand, seventy-three".