2600540681 has 2 divisors, whose sum is σ = 2600540682. Its totient is φ = 2600540680.

The previous prime is 2600540653. The next prime is 2600540687. The reversal of 2600540681 is 1860450062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2266236025 + 334304656 = 47605^2 + 18284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2600540681 is a prime.

It is a super-2 number, since 2×2600540681² = 13525623667071887522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2600540687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300270340 + 1300270341.

It is an arithmetic number, because the mean of its divisors is an integer number (1300270341).

Almost surely, 2^2600540681 is an apocalyptic number.

It is an amenable number.

2600540681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2600540681 is an equidigital number, since it uses as much as digits as its factorization.

2600540681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2600540681 is about 50995.4966737260. The cubic root of 2600540681 is about 1375.1641775972.

The spelling of 2600540681 in words is "two billion, six hundred million, five hundred forty thousand, six hundred eighty-one".