11581680203 has 2 divisors, whose sum is σ = 11581680204. Its totient is φ = 11581680202.

The previous prime is 11581680161. The next prime is 11581680251. The reversal of 11581680203 is 30208618511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11581680203 - 2⁶ = 11581680139 is a prime.

It is not a weakly prime, because it can be changed into another prime (11581680283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5790840101 + 5790840102.

It is an arithmetic number, because the mean of its divisors is an integer number (5790840102).

Almost surely, 2^11581680203 is an apocalyptic number.

11581680203 is a deficient number, since it is larger than the sum of its proper divisors (1).

11581680203 is an equidigital number, since it uses as much as digits as its factorization.

11581680203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 11581680203 in words is "eleven billion, five hundred eighty-one million, six hundred eighty thousand, two hundred three".