60819805561 has 2 divisors, whose sum is σ = 60819805562. Its totient is φ = 60819805560.

The previous prime is 60819805537. The next prime is 60819805577. The reversal of 60819805561 is 16550891806.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60703597161 + 116208400 = 246381^2 + 10780^2 .

It is a cyclic number.

It is not a de Polignac number, because 60819805561 - 2⁷ = 60819805433 is a prime.

It is not a weakly prime, because it can be changed into another prime (60819805261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30409902780 + 30409902781.

It is an arithmetic number, because the mean of its divisors is an integer number (30409902781).

Almost surely, 2^60819805561 is an apocalyptic number.

It is an amenable number.

60819805561 is a deficient number, since it is larger than the sum of its proper divisors (1).

60819805561 is an equidigital number, since it uses as much as digits as its factorization.

60819805561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 49.

The spelling of 60819805561 in words is "sixty billion, eight hundred nineteen million, eight hundred five thousand, five hundred sixty-one".