2681126621 has 2 divisors, whose sum is σ = 2681126622. Its totient is φ = 2681126620.

The previous prime is 2681126447. The next prime is 2681126633. The reversal of 2681126621 is 1266211862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2676924121 + 4202500 = 51739^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681126621 - 2¹⁰ = 2681125597 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 (2681126641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340563310 + 1340563311.

It is an arithmetic number, because the mean of its divisors is an integer number (1340563311).

Almost surely, 2^2681126621 is an apocalyptic number.

It is an amenable number.

2681126621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681126621 is an equidigital number, since it uses as much as digits as its factorization.

2681126621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 2681126621 is about 51779.5965704639. The cubic root of 2681126621 is about 1389.2245249191.

The spelling of 2681126621 in words is "two billion, six hundred eighty-one million, one hundred twenty-six thousand, six hundred twenty-one".