7226818861 has 2 divisors, whose sum is σ = 7226818862. Its totient is φ = 7226818860.

The previous prime is 7226818831. The next prime is 7226818867. The reversal of 7226818861 is 1688186227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6856833636 + 369985225 = 82806^2 + 19235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7226818861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7226818867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3613409430 + 3613409431.

It is an arithmetic number, because the mean of its divisors is an integer number (3613409431).

Almost surely, 2^7226818861 is an apocalyptic number.

It is an amenable number.

7226818861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7226818861 is an equidigital number, since it uses as much as digits as its factorization.

7226818861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 49.

The square root of 7226818861 is about 85010.6985090700. The cubic root of 7226818861 is about 1933.3733286976.

The spelling of 7226818861 in words is "seven billion, two hundred twenty-six million, eight hundred eighteen thousand, eight hundred sixty-one".