61117161617 has 8 divisors (see below), whose sum is σ = 61276651680. Its totient is φ = 60957721440.

The previous prime is 61117161613. The next prime is 61117161619. The reversal of 61117161617 is 71616171116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61117161617 - 2² = 61117161613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61117161613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4591742 + ... + 4605032.

It is an arithmetic number, because the mean of its divisors is an integer number (7659581460).

Almost surely, 2^61117161617 is an apocalyptic number.

It is an amenable number.

61117161617 is a deficient number, since it is larger than the sum of its proper divisors (159490063).

61117161617 is a wasteful number, since it uses less digits than its factorization.

61117161617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24943.

The product of its digits is 10584, while the sum is 38.

The spelling of 61117161617 in words is "sixty-one billion, one hundred seventeen million, one hundred sixty-one thousand, six hundred seventeen".