61080099917 has 2 divisors, whose sum is σ = 61080099918. Its totient is φ = 61080099916.

The previous prime is 61080099911. The next prime is 61080099959. The reversal of 61080099917 is 71999008016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42019260196 + 19060839721 = 204986^2 + 138061^2 .

It is a cyclic number.

It is not a de Polignac number, because 61080099917 - 2¹⁶ = 61080034381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61080099911) 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, 30540049958 + 30540049959.

It is an arithmetic number, because the mean of its divisors is an integer number (30540049959).

Almost surely, 2^61080099917 is an apocalyptic number.

It is an amenable number.

61080099917 is a deficient number, since it is larger than the sum of its proper divisors (1).

61080099917 is an equidigital number, since it uses as much as digits as its factorization.

61080099917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 50.

The spelling of 61080099917 in words is "sixty-one billion, eighty million, ninety-nine thousand, nine hundred seventeen".