61116565065599 has 4 divisors (see below), whose sum is σ = 62768364121464. Its totient is φ = 59464766009736.

The previous prime is 61116565065581. The next prime is 61116565065601. The reversal of 61116565065599 is 99556056561116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61116565065599 - 2⁴⁰ = 60017053437823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61116565065529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825899527877 + ... + 825899527950.

It is an arithmetic number, because the mean of its divisors is an integer number (15692091030366).

Almost surely, 2^{61116565065599} is an apocalyptic number.

61116565065599 is a deficient number, since it is larger than the sum of its proper divisors (1651799055865).

61116565065599 is a wasteful number, since it uses less digits than its factorization.

61116565065599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651799055864.

The product of its (nonzero) digits is 65610000, while the sum is 65.

The spelling of 61116565065599 in words is "sixty-one trillion, one hundred sixteen billion, five hundred sixty-five million, sixty-five thousand, five hundred ninety-nine".