2056161555605 has 16 divisors (see below), whose sum is σ = 2470703938560. Its totient is φ = 1642722964608.

The previous prime is 2056161555601. The next prime is 2056161555607. The reversal of 2056161555605 is 5065551616502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2056161555605 - 2² = 2056161555601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2056161555605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056161555601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49906844 + ... + 49948026.

It is an arithmetic number, because the mean of its divisors is an integer number (154418996160).

Almost surely, 2^{2056161555605} is an apocalyptic number.

It is an amenable number.

2056161555605 is a deficient number, since it is larger than the sum of its proper divisors (414542382955).

2056161555605 is a wasteful number, since it uses less digits than its factorization.

2056161555605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54340.

The product of its (nonzero) digits is 1350000, while the sum is 47.

The spelling of 2056161555605 in words is "two trillion, fifty-six billion, one hundred sixty-one million, five hundred fifty-five thousand, six hundred five".