2610005681 has 2 divisors, whose sum is σ = 2610005682. Its totient is φ = 2610005680.

The previous prime is 2610005677. The next prime is 2610005687. The reversal of 2610005681 is 1865000162.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2235776656 + 374229025 = 47284^2 + 19345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2610005681 - 2² = 2610005677 is a prime.

It is a super-3 number, since 3×2610005681³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2610005687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305002840 + 1305002841.

It is an arithmetic number, because the mean of its divisors is an integer number (1305002841).

Almost surely, 2^2610005681 is an apocalyptic number.

It is an amenable number.

2610005681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2610005681 is an equidigital number, since it uses as much as digits as its factorization.

2610005681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2610005681 is about 51088.2146977167. The cubic root of 2610005681 is about 1376.8305195036.

The spelling of 2610005681 in words is "two billion, six hundred ten million, five thousand, six hundred eighty-one".