2440126681 has 2 divisors, whose sum is σ = 2440126682. Its totient is φ = 2440126680.

The previous prime is 2440126643. The next prime is 2440126709. The reversal of 2440126681 is 1866210442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2197265625 + 242861056 = 46875^2 + 15584^2 .

It is a cyclic number.

It is not a de Polignac number, because 2440126681 - 2¹⁵ = 2440093913 is a prime.

It is a super-2 number, since 2×2440126681² = 11908436438656151522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2440126621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220063340 + 1220063341.

It is an arithmetic number, because the mean of its divisors is an integer number (1220063341).

Almost surely, 2^2440126681 is an apocalyptic number.

It is an amenable number.

2440126681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440126681 is an equidigital number, since it uses as much as digits as its factorization.

2440126681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2440126681 is about 49397.6384152117. The cubic root of 2440126681 is about 1346.2863976777.

The spelling of 2440126681 in words is "two billion, four hundred forty million, one hundred twenty-six thousand, six hundred eighty-one".