2541800861 has 2 divisors, whose sum is σ = 2541800862. Its totient is φ = 2541800860.

The previous prime is 2541800839. The next prime is 2541800879. The reversal of 2541800861 is 1680081452.

2541800861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2531599225 + 10201636 = 50315^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541800861 - 2¹⁸ = 2541538717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2541800801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270900430 + 1270900431.

It is an arithmetic number, because the mean of its divisors is an integer number (1270900431).

Almost surely, 2^2541800861 is an apocalyptic number.

It is an amenable number.

2541800861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541800861 is an equidigital number, since it uses as much as digits as its factorization.

2541800861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 2541800861 is about 50416.2757549583. The cubic root of 2541800861 is about 1364.7313690892.

The spelling of 2541800861 in words is "two billion, five hundred forty-one million, eight hundred thousand, eight hundred sixty-one".