2056505229961 has 12 divisors (see below), whose sum is σ = 2576281277892. Its totient is φ = 1627125016608.

The previous prime is 2056505229959. The next prime is 2056505229983. The reversal of 2056505229961 is 1699225056502.

It can be written as a sum of positive squares in 2 ways, for example, as 870453546361 + 1186051683600 = 932981^2 + 1089060^2 .

It is not a de Polignac number, because 2056505229961 - 2¹ = 2056505229959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2056505229899 and 2056505229908.

It is not an unprimeable number, because it can be changed into a prime (2056505229661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1614210690 + ... + 1614211963.

It is an arithmetic number, because the mean of its divisors is an integer number (214690106491).

Almost surely, 2^{2056505229961} is an apocalyptic number.

It is an amenable number.

2056505229961 is a deficient number, since it is larger than the sum of its proper divisors (519776047931).

2056505229961 is a wasteful number, since it uses less digits than its factorization.

2056505229961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228422680 (or 3228422673 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 2056505229961 in words is "two trillion, fifty-six billion, five hundred five million, two hundred twenty-nine thousand, nine hundred sixty-one".