2051216166711 has 4 divisors (see below), whose sum is σ = 2734954888952. Its totient is φ = 1367477444472.

The previous prime is 2051216166691. The next prime is 2051216166719. The reversal of 2051216166711 is 1176616121502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2051216166711 - 2¹¹ = 2051216164663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051216166711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051216166719) 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 in 3 ways as a sum of consecutive naturals, for example, 341869361116 + ... + 341869361121.

It is an arithmetic number, because the mean of its divisors is an integer number (683738722238).

Almost surely, 2^{2051216166711} is an apocalyptic number.

2051216166711 is a deficient number, since it is larger than the sum of its proper divisors (683738722241).

2051216166711 is an equidigital number, since it uses as much as digits as its factorization.

2051216166711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683738722240.

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 2051216166711 in words is "two trillion, fifty-one billion, two hundred sixteen million, one hundred sixty-six thousand, seven hundred eleven".