2656173081 has 32 divisors (see below), whose sum is σ = 3702048768. Its totient is φ = 1692613440.

The previous prime is 2656173067. The next prime is 2656173083. The reversal of 2656173081 is 1803716562.

It is not a de Polignac number, because 2656173081 - 2¹¹ = 2656171033 is a prime.

It is a super-2 number, since 2×2656173081² = 14110510872458065122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2656173083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1785520 + ... + 1787006.

It is an arithmetic number, because the mean of its divisors is an integer number (115689024).

Almost surely, 2^2656173081 is an apocalyptic number.

It is an amenable number.

2656173081 is a deficient number, since it is larger than the sum of its proper divisors (1045875687).

2656173081 is a wasteful number, since it uses less digits than its factorization.

2656173081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 2656173081 is about 51538.0740909088. The cubic root of 2656173081 is about 1384.9011960604.

The spelling of 2656173081 in words is "two billion, six hundred fifty-six million, one hundred seventy-three thousand, eighty-one".