2156566576211 has 2 divisors, whose sum is σ = 2156566576212. Its totient is φ = 2156566576210.

The previous prime is 2156566576201. The next prime is 2156566576243. The reversal of 2156566576211 is 1126756656512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156566576211 - 2²² = 2156562381907 is a prime.

It is a super-2 number, since 2×2156566576211² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2156566576201) 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, 1078283288105 + 1078283288106.

It is an arithmetic number, because the mean of its divisors is an integer number (1078283288106).

Almost surely, 2^{2156566576211} is an apocalyptic number.

2156566576211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156566576211 is an equidigital number, since it uses as much as digits as its factorization.

2156566576211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 53.

The spelling of 2156566576211 in words is "two trillion, one hundred fifty-six billion, five hundred sixty-six million, five hundred seventy-six thousand, two hundred eleven".