7798229861 has 2 divisors, whose sum is σ = 7798229862. Its totient is φ = 7798229860.

The previous prime is 7798229759. The next prime is 7798229941. The reversal of 7798229861 is 1689228977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6923904100 + 874325761 = 83210^2 + 29569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7798229861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7798229861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7798249861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3899114930 + 3899114931.

It is an arithmetic number, because the mean of its divisors is an integer number (3899114931).

Almost surely, 2^7798229861 is an apocalyptic number.

It is an amenable number.

7798229861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7798229861 is an equidigital number, since it uses as much as digits as its factorization.

7798229861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 59.

The square root of 7798229861 is about 88307.5866559607. The cubic root of 7798229861 is about 1983.0424488367.

The spelling of 7798229861 in words is "seven billion, seven hundred ninety-eight million, two hundred twenty-nine thousand, eight hundred sixty-one".