61184566081 has 6 divisors (see below), whose sum is σ = 61730826950. Its totient is φ = 60643097088.

The previous prime is 61184566073. The next prime is 61184566109. The reversal of 61184566081 is 18066548116.

It is a happy number.

61184566081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 323676081 + 60860890000 = 17991^2 + 246700^2 .

It is not a de Polignac number, because 61184566081 - 2³ = 61184566073 is a prime.

It is a super-2 number, since 2×61184566081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61184566031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2383056 + ... + 2408593.

Almost surely, 2^61184566081 is an apocalyptic number.

It is an amenable number.

61184566081 is a deficient number, since it is larger than the sum of its proper divisors (546260869).

61184566081 is an equidigital number, since it uses as much as digits as its factorization.

61184566081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791875 (or 4791762 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 61184566081 in words is "sixty-one billion, one hundred eighty-four million, five hundred sixty-six thousand, eighty-one".