2011643178247 has 2 divisors, whose sum is σ = 2011643178248. Its totient is φ = 2011643178246.

The previous prime is 2011643178173. The next prime is 2011643178301. The reversal of 2011643178247 is 7428713461102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011643178247 - 2¹¹ = 2011643176199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011643178197 and 2011643178206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011643878247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005821589123 + 1005821589124.

It is an arithmetic number, because the mean of its divisors is an integer number (1005821589124).

Almost surely, 2^{2011643178247} is an apocalyptic number.

2011643178247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011643178247 is an equidigital number, since it uses as much as digits as its factorization.

2011643178247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 2011643178247 in words is "two trillion, eleven billion, six hundred forty-three million, one hundred seventy-eight thousand, two hundred forty-seven".