2768240621 has 2 divisors, whose sum is σ = 2768240622. Its totient is φ = 2768240620.

The previous prime is 2768240567. The next prime is 2768240633. The reversal of 2768240621 is 1260428672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1524902500 + 1243338121 = 39050^2 + 35261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768240621 - 2⁶ = 2768240557 is a prime.

It is a super-2 number, since 2×2768240621² = 15326312271508931282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2768240681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384120310 + 1384120311.

It is an arithmetic number, because the mean of its divisors is an integer number (1384120311).

Almost surely, 2^2768240621 is an apocalyptic number.

It is an amenable number.

2768240621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2768240621 is an equidigital number, since it uses as much as digits as its factorization.

2768240621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 2768240621 is about 52614.0724616523. The cubic root of 2768240621 is about 1404.1104742103.

The spelling of 2768240621 in words is "two billion, seven hundred sixty-eight million, two hundred forty thousand, six hundred twenty-one".