2011802730809 has 2 divisors, whose sum is σ = 2011802730810. Its totient is φ = 2011802730808.

The previous prime is 2011802730797. The next prime is 2011802730871. The reversal of 2011802730809 is 9080372081102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1260455290000 + 751347440809 = 1122700^2 + 866803^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011802730809 - 2⁴ = 2011802730793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011802730409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005901365404 + 1005901365405.

It is an arithmetic number, because the mean of its divisors is an integer number (1005901365405).

Almost surely, 2^{2011802730809} is an apocalyptic number.

It is an amenable number.

2011802730809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011802730809 is an equidigital number, since it uses as much as digits as its factorization.

2011802730809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 2011802730809 in words is "two trillion, eleven billion, eight hundred two million, seven hundred thirty thousand, eight hundred nine".