2561277163 has 16 divisors (see below), whose sum is σ = 2621445120. Its totient is φ = 2501994496.

The previous prime is 2561277161. The next prime is 2561277167. The reversal of 2561277163 is 3617721652.

It is not a de Polignac number, because 2561277163 - 2¹ = 2561277161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561277161) 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 15 ways as a sum of consecutive naturals, for example, 3561918 + ... + 3562636.

It is an arithmetic number, because the mean of its divisors is an integer number (163840320).

Almost surely, 2^2561277163 is an apocalyptic number.

2561277163 is a deficient number, since it is larger than the sum of its proper divisors (60167957).

2561277163 is a wasteful number, since it uses less digits than its factorization.

2561277163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its digits is 105840, while the sum is 40.

The square root of 2561277163 is about 50609.0620640217. The cubic root of 2561277163 is about 1368.2082109800.

The spelling of 2561277163 in words is "two billion, five hundred sixty-one million, two hundred seventy-seven thousand, one hundred sixty-three".