19608777061 has 2 divisors, whose sum is σ = 19608777062. Its totient is φ = 19608777060.

The previous prime is 19608777047. The next prime is 19608777073. The reversal of 19608777061 is 16077780691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19608680961 + 96100 = 140031^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 19608777061 - 2¹⁵ = 19608744293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19608777031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9804388530 + 9804388531.

It is an arithmetic number, because the mean of its divisors is an integer number (9804388531).

Almost surely, 2^19608777061 is an apocalyptic number.

It is an amenable number.

19608777061 is a deficient number, since it is larger than the sum of its proper divisors (1).

19608777061 is an equidigital number, since it uses as much as digits as its factorization.

19608777061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 19608777061 in words is "nineteen billion, six hundred eight million, seven hundred seventy-seven thousand, sixty-one".