61100560009 has 2 divisors, whose sum is σ = 61100560010. Its totient is φ = 61100560008.

The previous prime is 61100559977. The next prime is 61100560033. The reversal of 61100560009 is 90006500116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60686844409 + 413715600 = 246347^2 + 20340^2 .

It is a cyclic number.

It is not a de Polignac number, because 61100560009 - 2⁵ = 61100559977 is a prime.

It is not a weakly prime, because it can be changed into another prime (61107560009) 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, 30550280004 + 30550280005.

It is an arithmetic number, because the mean of its divisors is an integer number (30550280005).

Almost surely, 2^61100560009 is an apocalyptic number.

It is an amenable number.

61100560009 is a deficient number, since it is larger than the sum of its proper divisors (1).

61100560009 is an equidigital number, since it uses as much as digits as its factorization.

61100560009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The spelling of 61100560009 in words is "sixty-one billion, one hundred million, five hundred sixty thousand, nine".