2011943308709 has 4 divisors (see below), whose sum is σ = 2012630685504. Its totient is φ = 2011255931916.

The previous prime is 2011943308663. The next prime is 2011943308723. The reversal of 2011943308709 is 9078033491102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011943308709 - 2¹⁶ = 2011943243173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011943305709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343684007 + ... + 343689860.

It is an arithmetic number, because the mean of its divisors is an integer number (503157671376).

Almost surely, 2^{2011943308709} is an apocalyptic number.

It is an amenable number.

2011943308709 is a deficient number, since it is larger than the sum of its proper divisors (687376795).

2011943308709 is an equidigital number, since it uses as much as digits as its factorization.

2011943308709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687376794.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 2011943308709 in words is "two trillion, eleven billion, nine hundred forty-three million, three hundred eight thousand, seven hundred nine".